This rubber O-ring has a wide range of applications and can be used for sealing and leakage repair of various components such as faucets, pipes, high-pressure cleaners, hose nozzles, car engines, mechanical bearings, Marine equipment, kitchen and bathroom water pipes, etc. The set includes 32 metric sizes of O-rings, with outer diameters ranging from 4 mm to 50 mm and thicknesses of 1 mm, 1.5 mm, 2 mm and other specifications, which can meet most sealing requirements. The kit is equipped with a 4-piece set of precision crochet hooks and picking needles, including full crochet hooks, 45° picking needles, 90° picking needles and straight picking needles. It features a high-torque acetate handle and precision needle tip design, making it suitable for the disassembly and assembly of precision fasteners such as clips, wires and O-rings. The O-rings are made of high-quality commercial-grade nitrile rubber (NBR), featuring excellent high and low-temperature performance. They can maintain good elasticity in an environment ranging from -40 to + 120, and are also resistant to ozone and weather, making them suitable for thermal mechanical seal scenarios. The product is packaged in a sturdy plastic storage box. The 32 sizes of O-rings are arranged in ascending order, and each size is accompanied by a detailed label. It is convenient to take out and there is no need to frequently visit the hardware store to purchase.