Its yellow finish enhances visibility. The cylinder connection is M10×1 right-hand thread with an outlet size of 1/8".
Mini Metal Argon CO2 Regulator with 6mm Hose Connector and Flow Gauge
SIP Disposable Welding Gas Bottle Regulator Brass 1/8" BSP MIG TIG CO2 Argon
5PC CO2/ARGON GAS 10 LITRE SGSCO2ARG10 (Collection only, Bottle Surcharge £85)
Sealey Gas Regulator + Guage For Disposable Cylinder CO2 / Argon ( Mig Welder)
MINI GAS BOTTLE REGULATOR FLOW GAUGE NITROGEN CO2 ARGON MIG TIG WELDING 4mm