Feature A Fits SCRA-75 / 76 / 77 Top Plates with 1.5" / 38 mm, 1.93" / 49 mm, and 2.26" / 57 mm Center Heights for Ideal Eye Alignment A Compatible with Ring Caps of XASR-A01, XASR-A02, XASR-A03 X-ACCU Mount Assembly Kit, Ensuring Seamless Modular Integration Specification Specification Details Height: 8 mm / 0.31 in Length: 46 mm / 1.81 in Material: 6061-T6 Aluminum Alloy Weight: 16 g / 0.56 oz Footprint: TEK Finish: Black Matte Items in the Package: T15 Torx Wrench, M4x9 Screws Size Interface Footprint Video