•These straight, 90 degree, 45 degree angled zerks allows you to simply insert lubricant directly into the bearing without having to disassemble or replace the bearing, perfect for restoration and replacing missing or broken grease zerks on your machinery •Made of qualified material, high hardness, rust-resistance, oil spill proof, ensures a long service time •These commonly used zerks very suitable for many most automotive, motorcycle, truck, farm, and industrial applications Specifications: •Process: blue zinc electroplating •Mainly used in: engineering machinery, automobiles, bearing seats, universal joints, ships, mechanical equipment, etc. Package included: •15 x 1/4"-28 Straight Hydraulic Grease Fitting •15 x 1/8"-28 Straight Hydraulic Grease Fitting •5 x 1/4"-28 45° Angled Hydraulic Grease Fitting •5 x 1/4"-28 90° Angled Hydraulic Grease Fitting •5 x 1/8"-28 90° Angled Hydraulic Grease Fitting •5 x 1/8"-28 45° Angled Hydraulic Grease Fitting •1 x Plastic Box