Length66, 68, 70 inch Material: Carbon Limb Fitting: Formula Syntactic Foam 8-layer Carbon Unmatched thermal and environmental stability Most durable and consistant limb core material ever developed Patented Hoyt technology (USPTO#4819608) Engineered for superior all-weather performance an shot smoothness New Delrin inlaid fork pads for decreased limb bolt friction, noise and limb wear