Aluminum Foil Sampling Bags, dual valve option, 10pcs

- Thickened aluminum foil composite film with polypropylene valve ensures excellent lightproof and leakproof for sensitive sample storage.
- Available in 10/50/100/200/300/500/1000mL volumes, each pack of 10 bags with single or dual valve options for flexible use.
- devised for routine analysis and sampling of light-sensitive materials, compatible with chemically stable and weakly active gases.
- Safe operating temperature range -20°C to +65°C; inflation pressure should not exceed 10KPa; keep away from open flames and sharp objects.
- Easy valve operation: turn clockwise to close, rotate about 1/2 turn anticlockwise to open; ideal for lab and field sampling applications.