Hawke XB30 Zoom Crossbow Scope 2-8x36 30mm Tube IR FFP 470-510FPS Magnification: 2-8x;Objective Lens Diameter: 36 mm;Tube Diameter: 30 mm;First focal plane illuminated reticle;Calibrated for crossbows: 470-510 FPS;Rheostat illumination;Fully multi-coated optics;High-torque zoom ring;Nitrogen-purged;Waterproof, fog-proof, and shockproof;Includes: Flip-up lens covers, CR2032 batterytable.productattributes, Item Category Code: 3300 Product Group Code: 3300C Product Sub Group 1: 3300C2 Inactive: No