Respirator Product 타입 = Respirator Hose Accessory 타입 = Air Hose 시리즈 = Versaflo Versaflo??Compressed Air Supply Tube. This 7.5 m Coiled Compressed Air Supply Tube (CAST) features a 3/8in British Standard Pipe (BSP) male thread at either end and forms an integral part of the 3M system approval process.