Features： 1、RUBBER MATERIAL: Made of rubber material, static prevention, oil and UV resistance, heat and wear resistant, durable, long service life 2、MEETS NEEDS: Soft and flexible O rings, just snap on, easy to install, can meet most plumbing, automotive and general maintenance needs 3、LONG LIFE: Rubber construction seals against leaks, gas, water, and most silicone oils and solvents. Flexible construction and thick wall allow for extended use 4、EASY ORGANIZATION: Stored in labelled and organized resealable box that saves you organizing and choosing sizes. Various thickness and sizes are in the box, very convenient to use 5、APPLICATIONS: Suitable for power supplies, control boxes, common power cord socket protection, appliances, tools, cars, trucks, trailers, electronic equipment, toys, bicycles, recreational vehicles, boats, pumps, furniture, etc. Specification： Item Type: Plumbing O Ring Seals Kit Material: Rubber Application: O Ring Rubber Colour: Black Quantity: 279 Uses: Mainly used for power supply, control box, common power cord socket protection, electrical appliances, tools, cars, trucks, trailers, electronic equipment, toys, bicycles, recreational vehicles, boats, pumps, furniture, etc. Package List： 279 x O Rings Assortment Set