Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: HEDMBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended C-HSPVLP-20 HiSorb septum plug, pk 20 Price on request U-COV10 O-Ring, low-emission,size 010, pk10(e2/e3 systems) Price on request SERZ-1097 Spare tube assembly, ACTI-VOC Price on request