Crimson Trace Corporation, Brushline, Rifle Scope, 4-12X40mm, 1" Tube, BDC Reticle, Matte Black WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. MAGNIFICATION: 4-12X RETICLE: CT CUSTOM BDC FOCAL PLANE: 2ND FOCAL PLANE OBJECTIVE LENS DIAMETER: 40 TUBE DIAMETER: 1 IN CLICK VALUE: 1/4 LENS COATING: GREEN MULTI COATED The Crimson Trace Brushline optics are designed with the hunter in mind and have been purposefully built from the ground up. The line features aerospace grade 1" tubes that are extremely lightweight as to not add extra weight to hunting rifles. They are fully multi-coated, nitrogen purged, waterproof, and ready for whatever elements they encounter. All Crimson Trace scopes are covered under the LIFETIME protection guaranteed warranty and backed by their award-winning customer service team.