Feature SCBSW-T1 Tauron Scope Side Focus Wheel Includes 3 Nitrile Rubber (NBR) Sleeves w/ Internal Diameters of 38.5mm / 1.52in, 36.3mm / 1.43in, and 34.5mm / 1.36in Fits Tauron Scope Side Focus Knobs for Secure and Reliable Adjustment Control with Smooth, Consistent Handling Durable 6061-T6 Aluminum Alloy Construction for Strength, Long-Term Stability, and Excellent Bending Resistance Specification SCBSW-T1 Tauron Scope Side Focus Wheel Specification Details Outer Diameter: 88 mm / 3.46 in Inside Diameter: 41 mm / 1.61 in Thickness: 23 mm / 0.91 in Weight: 56 g / 1.98 oz Material: 6061-T6 Aluminum Alloy Items in the Package: Three Sleeves, T10 Torx wrench, H2 Hex Wrench, etc. Size