This closed type, Hoffman Screw is made of chrome-plated brass. The opening measures 1 inch. The Hoffman Screw is perfect to use as a valve or tubing clamp with any rubber tubing. This screw allows you to open and close the rubber tubing during your projects. It is not sharp and as a result, it will not damage the rubber tube.
Below are the available bulk discount rates for each individual item when you purchase a certain amount