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 U-COV1516 Spare O-ring, black, for POD sampler (support body), pk 10 Price on request SERLFP-5002 Spare charger, ACTI-VOC Price on request SERZ-1070 Spare bag sampling accessory, ACTI-VOC Price on request