ITEM NAME:8pcs/set #10 Pyrex Glass Cup Kit Stubby Collets Body Gas Lens TIG Welding TorME Specification: Brand new Material: plastic, metal, glass Easy to assemble and use. Durable and practical. Widely used along with our Fortuneweld brand precision cold welder PCW220. Fits all WP-9/20/25 series air cooled welding torches. Advantage for transparent shield cup: It gives welders an extrodinary visibility and comfortable feeling during the welding job. Especially designed to helps to weld precision and tiny job where it requires to see the location very clearly. Helps to make uniform gas flow for welding which can help welding quality to to high. It can also help to save at least 30% gas comparing to common ceramic shield cup. They are widely compatible with original common spare parts of TIG torch. In this case, A) as to #10 transparent shield cup for torch WP9/20/25/24, you need to buy one extra O ring to complete the whole spare parts on the basis of original other spare parts. B) as to #12 big or small transparent shield cup for torch WP17/26/18, you need to buy one extra O ring to complete the whole spare parts on the basis of original other spare parts. It has longevity than other ceramic type shield cup because there is no too much touch with heat. Package included: 8 pcs/ set.They are widely compatible with original common spare parts of TIG torch. In this case. Fits all WP-9/20/25 series air cooled welding torches. It gives welders an extrodinary visibility and comfortable feeling during the welding job.