Features: Brand new and high quality Selected from flexible rubber: it have good resistance to oil or water leakage, phosphoric acid, hydrochloric acid Easy to use: Packed in plastic storage box with a snaps cover, easy to carry and easy to store. Offer a comprehensive selection of rubber washers for quick repairs, providing a reliable solution for various applications. Suitable for many users, including DIY enthusiasts and professional in plumbing and mechanical repair industry. Perfect for sealing pipe, faucets, and other component, these washers provide effective leakproof solution. Specifications: Material:Nitrile Rubber Specifications:6x1.5mm (50pcs) 6.5x1.5mm (50pcs) 7x1.5mm (50pcs) 8x1.5mm (50pcs) 9x1.5mm (50pcs) 10x1.5mm (50pcs) 11x1.5mm (50pcs) 12x1.5mm (50pcs) 13x1.5mm (50pcs) 14x1.5mm (30pcs) 15x1.5mm (30pcs) 16x1.5mm (30pcs) 17x2.4mm (20pcs) 18x2.4mm (20pcs) 19x2.4mm (20pcs) 20x2.4mm (20pcs) 21x2.4mm (20pcs) 22x2.4mm (20pcs) 23x2.4mm (20pcs) 24x2.4mm (20pcs) 25x3.1mm (10pcs) 26x3.1mm (10pcs) 27x3.1mm (10pcs) 28x3.1mm (10pcs) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 740Pcs O Rings