{WIDE APPLICATION}:Rubber o ring kits for pressure washr,automobiles,faucet plumbing hose nozzles sinks filters hydraulics fluid,engines maching bearings pumps,boats,oils,gas control valve,kitchen bathroom water fitting sealing leak repair | {MULTIPLE SIZE}: Oring assortment kit contains the most commonly used 24 size OD:(6mm/ 6.5mm/ 7mm/ 8mm/ 9mm/ 10mm/ 11mm/ 12mm/ 13mm/ 14mm/ 15mm/ 16mm/ 17mm/ 18mm/19mm/ 20mm/ 21mm/ 22mm/ 23mm/ 24mm/ 25mm/ 26mm/ 27mm/ 28mm) x THK:(1.5mm/ 2.4mm/3.1mm) | {MATERIAL}: Small black O rings made of high-quality commercial grade nitrile(NBR,Buna-N),it has excellent resist oil,high temperature and low temperature resistance,the working temperature range is from -40℃/-40℉ to 120℃/248℉,maintains good elasticity,has It has the advantages of ozone resistance and weather resistance | {CONVENIENT STORAGE}: Assorted o rings rubber gasket sealing washer are placed in a sturdy plastic storage box,each size with detailed label paper,are stored in order of small to large for easy retrieval.It can be used for months or even years rather than buying them at a hardware store | {SATISFACTION GUANTEE} TWCC brand always guarantees high-quality products and good after-sales service.If you have any unhappy,we would return your kit for free with no reason