Bearing seals are double-lipped rubber that provides superior exclusion of water, dirt and sand with improved grease retention, Steel garter spring guarantees constant pressure on the axle shaft, extending the life of the seal, Wheel seals are type TC nitrile elastomer, specifically designed to keep out water, dirt and sand, Packed with Chevron SR1-2 high-performance grease with rust and oxidation inhibitors, Seals have a rubber-coated outside diameter that creates an optimum seal at the hub, Kit includes all required bearings and seals to refit a wheel, High-speed, low-drag bearings are EMQ quality, Kits are per wheel., For MX1 hubs.