8Sinn 20cm 15MM Carbon Fiber Rods (2 Pieces) Key Features – Available lengths: 20cm, 30mm – Material: carbon fiber – Lightweight   Carbon fiber is known from its endurance and lightweight. Carbon Fiber Rods vs. Silver Rods weight differences: Two 20cm Carbon Fiber Rods – 50g Two 20cm Silver Rods – 100g Two 30cm Carbon Fiber Rods – 70g Two 30cm Silver Rods – 140g   8Sinn Carbon Fiber Rods are not threaded inside. Set includes: Two 15mm Carbon Fiber Rods