SGT Click-On Glass Indicating Oxygen Trap Back Catalog number: SGT-CO1021 Availability: In the manufacturer's stock Price on request - + Recommended RMSH-2 Big Universal Trap, 1/8inch fttgs,Helium 424,06 € BHT-4 Big Hydrocarbon Trap, 1/4in fittings 382,38 € RDT-1023 Cartridges,SplitVentTrap(3) 111,45 €