Ultra-stiff design for maximum efficiency Fast-dampening high-frequency response Built-in AVRS damping system for active shock management 100 % high modulus carbon construction Weights sold separately Weight thread size: 5/16" x 24 Specifications Diameter: .600" Weight: 10" (25 cm) 3.2 oz (92 grams) | 12" (30 cm) 3.5 oz (99 grams)