Check the listing for details. 1.25 31.7mm Barlow Lens 3x Apochromatic Three-element APO. Condition: New. Listed at 4.99 USD. 1.25 31.7mm Barlow Lens 3x Apochromatic Three-element APOFeatures: If you need more power than your eyepieces alone can provide, we offer a new apochromatic 3x Barlow lens to give a big magnification boost to any 1.25" eyepiece it's used with. This Barlow features an air-spaced, single-element optics. The housing is plastic. The lens edges and inner barrel are blackened to provide maximum contrast. so that your eyepiece barrels are not marred by the captive set screw. For those who need a very high quality Barlow for all-round use, the 3x Barlow is a very nice step up from the typical 2x achromatic Barlow commonly found on the market. Specification: Barrel size: 1.25” (31.7mm) Magnification factor: 3X Material: Plastic Color: Black Package Includes: 1 X Barlow Lens Kindly Note: If you need a huge quantity, contact us to get more competitive offer. Shipping and Payment: Payment : Paypal Shipped within 2 business days once payment done. 10~27 days to reach you. Refund and Guarantee: 30 Days Money Back Guarantee 180 Days - Free Exchange Please contact us with any questions or concerns,we will solve it until you satisfy.