Description The plastic drum caps feature a high-efficiency breathable design, allowing drum inner cap with pull ring to balance air inside and outside the barrel. Ideal for chemical storage, these drum inner plug seals minimize splash risk when opening and shield contents from contaminants for secure management of hazardous materials. Features -Color:Transparent -Material:Plastic -Size:5.20X4.20X1.80cm/2.04X1.65X0.71in -Efficient ventilation design: the plastic drum bung features a highefficiency venting system that balances internal and external , minimizing risks of liquid splashing when opening oil barrels -Safe chemical storage: specifically designed as a drum inner stopper cap, this airtight lid maintains proper airflow, helping reduce storage risk for various chemical materials -Durability with chemicals: crafted for longterm chemical exposure, the drum sealing plug with ring resists damage, ensuring product longevity even in demanding environments -Precise fit & prevention: the barrel inner sealing cap fits tightly over the barrel mouth, preventing foreign matter from entering and safe, meticulous chemical management -Easy installation & maintenance: as a replacement vent lid, it allows quick installation and removal, simplifying daily inspection and maintenance to enhance overall chemical handling efficiencyPackage list: 20 x barrel caps