LubriMatic Straight Grease Fitting 8mm 5 Pack 11-311These grease fittings are 8mm in length. Zerk fittings provide lubrication points for feeding lubricants to mechanical systems or bearings without overflow or leaks. It allows the grease to be pumped in while still under pressure. This is for a pack of 5 grease fittingsLubriMatic Grease Fitting Specifications Straight design; 8mm;