Features: 1. Long Service Life: The Rubber Ring Tank Gasket Is Made Of Tensile Rubber Material, Which Is Strong And Durable, No Wear, No Rust, Corrosion Resistance, Flexible And Not Easy To Break Or Crack, Supporting A Long Service Life 2. The Right Size: The Size Of The Fuel Scrubber Seal Is About 3.8 Cm/1.5 Inches Outer Diameter And 3 Cm/1.18 Inches Inner Diameter, Please Confirm The Size Before Purchasing 3. Good Compatibility: The Air Outlet Gasket Sealing Ring Is Compatible With Most Air Tank Water Outlets, No Need To Change The Sealing Ring Type When Using Different Air Tank Water Outlets, Which Is Convenient For Your Application 4.Easy To Carry And Store: Replaceable Air Cushions Are Convenient For You To Store Or Carry In Plastic Storage Boxes, Tool Boxes, Backpacks, Pockets, Etc., And Won'T Take Up Much Space In Your Cabinet When Not In Use Specification: 1. Model: Oil Drum Seal 2. Properties: Wear-Resistant 3. Outer Diameter: 38mm 4. Shape: O-Ring 5. Scope Of Application: Oil Drum 6. Use: Hole Sealing Package Includes: 1pc/10pcs X Sealing Rubber Gasket (depend on your choose) Notes: 1.Transition:1cm=10mm=0.39inch 2.Please Allow 1-3mm Error Due To Manual Measurement. Pls Make Sure You Do Not Mind Before You Bid. 3.Due To The Difference Between Different Monitors, The Picture May Not Reflect The Actual Color Of The Item. Thank You!