Cinevate Follow Focus Gear Rings are created with a fiber-reinforced composite and uses brass inserts to hold the spokes in place. The stainless steel spokes feature custom integrated nylon tips that will not mar your lens. The gear rings carry a lifetime warranty.Kit Includes:Follow Focus Gear RingFocus Gear Spokes (5 sets of spokes. Each set contains 6 spokes) Includes lengths: 3/8", 1/2", 5 /8", 3/4", 1"