740 pieces rubber gasket O-ring kit in 24 sizes, covering common sizes, all your needs. The sizes are labeled so you know exactly what size they are. A large assortment of O-rings made from commercial nitrile butadiene rubber (NBR) for resistance to UV radiation, lubricants and greases, heat and abrasion resistance. Easy to use: Stored in a labeled and organized box, easy to find the sizes you need; Robust storage box is better for organization and portability. O-ring seals seal and prevent water leaks in faucets, sinks, toilets, plumbing and machinery. Fits many applications: garage, general plumbers, mechanics, workshop, car, door, electrical appliance, pump and boat... A good kit for general repairs. Color: Black Material: Rubber Contents: 740 * rubber gaskets 1 * plastic box 1 * size guide Only the above content, others are not included. Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.