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 Specifications Diameter: .600" Weight: 27" (69 cm) 6.2 oz (175 grams) | 30" (76 cm) 6.5 oz (186 grams) Weight thread size: 5/16" x 24