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-T19PAH-2S PAH cold trap, UNITY 2/xr and TD-100/xr Price on request U-COV35 O-Ring, low-emission, size 035,pk10 Price on request RMK-0006HT Routine maintenance kit for M-CTE250I Price on request