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-T15ATA-2S UNITY 2 Cold trap, TO-15/TO-17 Air Toxics C2/3 Price on request RMK-0005 RoutMainten kit - TT24-7 Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request