Nitrogen Spray Gun ET-1 221-01 Replacement filter, .5 micron PTFE membrane in polyethylene housing. 221-08 Replacement filter, .22 micron PTFE membrane in polyethylene housing. 221-04 Tube/Fitting Assembly to hook up nitrogen gun includes 8 foot length 1/4" O.D. FEP tubing and two C4-4N fittings (1/4" tube to 1/4" MNPT) of PFA. SG-1 제품에 대한 문의사항이 ..