Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: MBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended U-COV45 O-Ring, low-emission, 5.92mm i.d. pk10 (6mm Difflo Price on request U-COV1516 Spare O-ring, black, for POD sampler (support body), pk 10 Price on request M-SPC15-250 Collar spacer, alum 15mm, for M-CTE250I,pk 4 Price on request