The 2019 CX7 limbs use a strong synthetic foam core resulting in effective shock absorption, superior vibration dampening and extremely quick arrow flight. Made using Win&Win’s advanced pre-preg carbon material, decades of experience and know-how. The CX7 Limb provides quick, stable and accurate shooting LENGTH - Short, Medium, Long WEIGHT - 28 to 48 lbs (2 lbs increment) MATERIAL - Nano Foam Core / High Modulus Carbon FINISH - Matt