Jazzy #10 kit is the Fupa 12's little sister , The Jazzy is made with the same patented diffuser as the fupa 12, just in a smaller package. She uses less gas for great results on mild steel with 20 -25 CFH argon flow using 3/32 tungsten size. You will get 2 glass cups, 1 spare diffuser and 4 orings . Specifications: Material: Borosilicate Glass Cup Size: #10 JAZZY Style: 45V44 Gas Lens w/ 9 or 20 Torch Quantity: 2 Cup Kits Part #: 901-01012-1020