Shrewd S2 Bow Stabilizers 26 in Black. The S2 has a .630" O.D. and includes three 1 oz. stainless steel weights three 1/3 oz. aluminum weights and a 5/16-24 thread. Specifications for Shrewd S2 Bow Stabilizers: Manufacturer: Shrewd Color: Black Fabric/Material: Carbon Weight: 3.07 oz Diameter: 0.63 in Features of Shrewd Shrewd S2 Stabilizer: High modulus carbon .630" O.D. carbon High performing stabilizer at a modest price Internal Truss Dampening System Weights included Package Contents: Shrewd S2 Bow Stabilizer Shrewd SMSS226: S2 Bow Stabilizers 26 in Black