Comes with 4 #8pro cups and mounting o-rings .5"/12.7mm Inside Diameter 200amp Max rating, AC/DC Polarity Cup 3/32-2.4mm or 1/16 – 1.6 mm Tungsten With a #9 or #20 torch you will need to have a 45V44 gas lens. If you have a #17, #18 or #26 size torch you will need to buy a Furick #17 torch kit. Comes with 4 #8pro cups and mounting o-rings. The #8pro cup is an AC/DC polarity consumable with a 200 amp rating and has an inner diameter of .500 / 12.5mm. It is commonly used for most mild steel and stainless steel applications where good gas coverage is wanted and arc stability is critical. The #8 size cups are a great all around size for most industrial, Hot Rod and hobbyist applications. It will require 15-20 CFH of argon flow. You can run 3/32-2.4mm or 1/16 – 1.6 mm tungsten with this cup. Please do not “walk the Cup” with any of the Furickcup line of Borosilicate glass cups. #8 pro Mounting If you have a #17, #18 or #26 size torch you will need a #17 kit , If you have a #9 or #20 torch you will need to have a 45V44 gas lens. If you have one already you can use it. Keep in mind that import brands yield lower results.