Features 1、Made of high-quality nitrile rubber. Operating temperature range from -40℉ to 248℉ 2、Good sealing, good heat resistance, good deformation resistance, good abrasion resistance, good water resistance 3、Especially good gasoline resistance and aliphatic hydrocarbon oil performance 4、740 pieces are enough, you can use for months or even years, 24 sizes, from 6mm to 28mm, a variety of sizes for you to choose 5、Packed in a sturdy plastic box with a clear label for easy use. Arrange from left to right in order of size for easy removal Specification Item Type: O Ring Kits Material: Rubber Purpose: Good Maintenance of Common Household Accessories Such As Faucets, Hose Nozzles, or Auto Parts, Pneumatic Parts, Automatic Parts, Etc Package List 50 x Black NitRile RubbeR O-Ring (6x1.5mm) 50 x Black NitRile RubbeR O-Ring (6.5x1.5mm) 50 x Black NitRile RubbeR O-Ring (7x1.5mm) 50 x Black NitRile RubbeR O-Ring (8x1.5mm) 50 x Black NitRile RubbeR O-Ring (9x1.5mm) 50 x Black NitRile RubbeR O-Ring (10x1.5mm) 50 x Black NitRile RubbeR O-Ring 11x1.5mm) 50 x Black NitRile RubbeR O-Ring (12x1.5mm) 50 x Black NitRile RubbeR O-Ring (13x1.5mm) 30 x Black NitRile RubbeR O-Ring (14x1.5mm) 30 x Black NitRile RubbeR O-Ring (15x1.5mm) 30 x Black NitRile RubbeR O-Ring (16x1.5mm) 20 x Black NitRile RubbeR O-Ring (17x2.4mm) 20 x Black NitRile RubbeR O-Ring (18x2.4mm) 20 x Black NitRile RubbeR O-Ring (19x2.4mm) 20 x Black NitRile RubbeR O-Ring (20x2.4mm) 20 x Black NitRile RubbeR O-Ring (21x2.4mm) 20 x Black NitRile RubbeR O-Ring (22x2.4mm) 20 x Black NitRile RubbeR O-Ring (23x2.4mm) 20 x Black NitRile RubbeR O-Ring (24x2.4mm) 10 x Black NitRile RubbeR O-Ring (25x3.1mm) 10 x Black NitRile RubbeR O-Ring (26x3.1mm) 10 x Black NitRile RubbeR O-Ring (27x3.1mm) 10 x Black NitRile RubbeR O-Ring (28x3.1mm)