Advantage for transparent shield cup: It gives welders an extrodinary visibility and comfortable feeling during the welding job.Especially designed to helps to weld and tiny job where it requires to see the location very clearly. Easy to assemble and use. and practical.Widely used along with our Fortuneweld cold welder PCW220.Fits all -9/20/25 series air cooled welding torches. new. glass cup (ID): .15*19.7mm.Stubby gas lens: .2.4 mm Helps to make uniform gas for welding which can help welding quality to to high.It can also help to save at least 30% gas comparing to common cup. Pasuihcay 7Pcs/Set number 12 Glass Cup Kit Stubby Collets Body Gas Lens Tig Welding Torch For -9/20/ 25 Welding Accessories