odel 801 Flow Reg, Side Inlet with ISRV, Gas Type - Argon 30LPM. Features include: Wt. 1.3kg, Easy to read gauges, Inlet filter to trap impurities, Accurate, Fitted with internal self reseating safety relief valve, Forged brass body for maximum strength, Smooth, steady adjustment, Special threads and seals to reduce risk of leaking expensive odourless gas, Harris capsules seat with filter for reliability, Filter before outlet nipple to ensure flow