Pack of 5 'O' Rings
O rings for Turner Richards Dummy Launcher
Inexpensive and indispensible - a slight 'interference fit' between the launcher dummy and the O ring at the end of the dummy launcher spigot is essential if the dummy is to achieve distance when the dummy launcher is fired.
It is also helpful to keep the O ring lubricated with a smearing of petroleum jelly (e.g. Vaseline)