We sell two types of bearing kits MBS & Enduro Max Our own MBS bearings offer great value for money we use bearings with close contact seals for our frame pivot bearings keeping contaminants on the outside and lubrication on the inside. Quality bearings that last great value Enduro Max Bearings are full compliment chromium steel bearings strong and durable for suspension pivots These are application-specific bearings which have no retainers, allowing more balls to be packed inside of the cartridge