These plastic leak-proof lids are designed for use with various types of barrels, including water and chemical storage drums. They feature a secure inner thread that ensures a tight seal, preventing any leaks or spills. The reliable plastic construction makes them ideal for both indoor and outdoor use, providing reliable protection for your stored liquids. Features -Color:White -Material:Plastic -Size:6.00X5.85X2.10cm/2.36X2.30X0.83in(thread diameter: 5.85cm/2.3 inch) -Size:2.80X2.50X2.00cm/1.10X0.98X0.79in(thread diameter: 2.50cm/0.98 inch) - sealing performance: ensures effective prevention of chemical evaporation, maintaining storage safety and protecting contents during transportation -Durable structure drum lid: built to withstand harsh environments, the lid remains tightly sealed to minimize accidental spills or leaks -reliable material construction: made from plastic, long term usage without aging or deformation, even in harsh environments -Ideal for bulk storage: for chemical plants and laboratories, facilitating efficient management in large scale storage scenarios -Inner thread design: features a tight fitting inner thread structure that securely seals barrel openings, preventing leaks and ensuring safe chemical transport Package list: 40 x sealing cap(small) 40 x sealing cap(large)