200 540nm green glasses protection glasses blue laser safety glasses

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200-540nm green glasses protection glasses blue laser safety glasses free shipping

80 % of buyers enjoyed this product!

Availability: in stock

Price: US $3.37 / piece

Sale Price: US $1.95 / piece

	45 days Money back Returns accepted if product not as described, buyer pays return shipping; or keep the product & agree refund with seller.
	On-time Delivery Guarantees: On-time Delivery 60 days

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2015 new hot sale 200-540nm green glasses protection glasses blue laser safety glasses free shipping

Functions and parameters: [Name] laser protective eyewear [Protection] 520-540nm wavelength [Optical density OD] OD4 + [ visible light transmittance ] 55% [Features] absorption comprehensive protection Protection [Green laser for laser] Laser damage to the human eye Laser glasses is the body’s most sensitive organ. Due to the characteristics of the laser energy can highly concentrated space and time. Since the spectacle lens has a focusing effect on the retina so that the energy of laser irradiation per unit area higher than that suffered by the corresponding amount of incidence of nearly 10 times the cornea. Laser Monochrome good strong color in the eyes is minimal. Because pulsed laser injury is much faster than the blink reflex (eye blink reflex time is typically 150-250ms, while the pulsed laser can be as short 10ms), coupled with the extreme moment, in a very small area, energy focused on the release, even low doses of laser irradiation may also lead to serious damage to the retina or cornea Different wavelengths injury site of glasses Wavelength partition wavelength range (nm) main site of injury UV laser cornea 180-400 400-700 visible laser lens Near-infrared laser 700-1400 retina, choroid, lens , The far-infrared laser 1400-10600 cornea Introduce the principle of laser glasses Laser protective eyewear by light absorption principle: it is not selective for the light source, safe PROTECTION diffuse light; incident angle of the light source is not selective, all-round protection can be specific band laser and light, light and rapid response, decay rate is higher, the surface is not afraid to wear, even if there are scratch, does not affect the security light.

About Payment

1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. 2) Payment must be made within 1-3 days of order. 3) If you can’t checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days.

About Shipment

1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO) 2. Orders processed timely after the payment verification. 3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. 4. The images shown are not the actual item and are for your reference only. 5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transmit times may vary, particularly during the holiday season. 6. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction! 7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.

About Return & Refund

1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS! Shipping cost is bear by both seller and buyer in half. 2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po#. 3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpress. OR, you may choose to have a replacement. 4. We will bear all the shipping cost if the product(s) is (are) not as advertised.

About Guarantee

1. 12 months Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. 2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on aliexpress!

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Shipping Company	Shipping Cost	Estimated Delivery Time
		3 - 7 days
		3 - 7 days
		5 - 14 days
Post Air Mail	Free Shipping	15 - 45 days

Return Policy	If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller. N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service	On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).

Return Policy

If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.

Seller Service

On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).