The Jazzy 10 Ceramic kit includes 2 ceramic cups and a spare diffuser . It performs identical to the original glass version but has the added strength ceramic cups bring. It screws onto your 45V44 for the 9/20 torches or the Furick 17,18 and 26 adapter kit. It is great for mild steel and is made for walking as well. It can handle 175 amps DC with 3/32 . It is not recommended for AC. Part # 901-01011-1020