An authentic manufacturer-sourced replacement part that is specially designed for use with Grip-Rite nailers and staplers. This is the special grommet which is used to provide an air-tight seal for the trigger pin, please make sure to check appropriate diagrams of your model for the correct location and use of this hardware. Over time the...Read more material may begin to deteriorate and crack eventually requiring replacement. It is a high-quality component which is made of durable rubber and it is sold individually.