Dutton-Lainson 6332 1" Grease Keeper Caps
1 inch Grease Keeper dust caps with grease zirk and pressure relief valve. Protects wheel bearings from water and dirt with a positive hub seal. Supplies a reserve of lubrication and has built-in positive relief. Longer time between periodic repacking of bearings. Protects and extends bearing life. Zirk permits frequent greasing and relief valve eliminates excess pressure on grease seal. No complicated moving parts or gaskets that require costly maintenance and replacements. Easily installed in seconds, no need to remove hubs. A positive hub seal minimizes water entry when wheels are submerged. Zinc plated finish. Includes two protectors, each with a vinyl cover. Also fits 1-1/16 inch spindles.