STRAIGHT GREASE NIPPLE - Straight grease nipple with imperial 1/4"BSP thread. ZINC PLATED - Provides protection against corrosion. RESEALABLE BAG - Supplied in a pack of 25 in a resealable bag for easy storage. EASY TO USE - Grease nipples have a wide variety of uses, some include: Bearings, trailers, machinery, tractors, lawnmowers and many more. GREASE GUN COMPATIBLE - Suitable for use with Sealey air, cordless and hand operated grease guns as well as other makes of grease gun.