Ordering cups to fit your existing torch is important to guarantee that you get the correct products to get you welding quickly and properly, Please see below descriptions of torches and match your accordingly.
#17 #18 #26 torches
The torch on the left is usually supplied with all air cooled welding machines and is a bulkier torch but can handle more amps then a #9 torch, The #18 size torch is a water cooled #17 , You can really identify that you have a one of the listed torches by the size of the standard collet body that comes with the torch its overall length is 1.875 inches or 47mm as well as the standard Cups that come with the torch , You will need a #17 kit to run our cups, In which shrink your torch consumables down to a lighter more maneuverable torch.
#9 and #20 torch
These torches are usually purchased as an upgrade or they come standard with water cooled machines under 300 amps. They are a lighter, more maneuverable and widely used in the aftermarket automotive industries. As well and light weight materials production. You can identify by the stock collet bodies and cups are about 1 inch or 24 mm in length. With this torch you will need a 45V44 gas lens to rum most of our cups.