This pump is easy to install. Just add the cork to the pump and push it into your container. The cork measures 1-1/4" diameter at the top and tapers to 1" diameter at the bottom. The parts are made of impact resistant plastic w/ a 5-1/2" L. dip tube that be easily cut to length. The pump can be used to complete your handcrafted or decorated container or jar perfectly. Use for lotions, soaps, condiments and much more. It has a useful locking feature as well, that functions with a twist of the head. This offer is for 5 brand new black pump dispensers. Dispense your favorites with ease! Be sure to visit our Storefront to see more pumps styles and colors plus hundreds more products that fit all your craft, art and hobby needs!!!