provide a box of 480PCS containing 18 common sizes of O-ring kits, which can meet your daily home use and maintenance needs, and are easy to use and install.O-ring assortment set for High-quality rubber, high temperature resistance, wear resistance, high pressure resistance, corrosion resistance and long service lifeSet includes assorted o-rings size, Wide range of uses, pipelines, machinery, workshops, electrical appliances, bearings, pressure gauges, faucets, pumps, etc.places the corresponding O-ring in the transparent storage box with the size label to prevent loss and mixing.This is an excellent rubber o-ring assortment kit, water and oil resistance, good sealing, high temperature resistance, and the operating temperature range is -40 to 248. A good helper for the repairmanMaterial: rubberColour: BlackSize: 18 kindsQuantity: 480pcsspecification:Outer diameter x thickness3 x 1mm 50pcs4 x 1mm 50pcs4.5 x1mm 50pcs5 x 2mm 50pcs6 x 2mm 50pcs7 x 2mm 50pcs8 x2mm 30pcs9 x 2mm 30pcs10 x 2mm 30pcs12 x 3mm 15cs13 x 3mm 15pcs14 x 2.5mm 15pcs17 x 2.5mm 8pcs18 x 4mm 8pcs20x 2mm 8pcs22 x 2mm 8pcs25 x 2.4mm 8pcs27 x 3mm 5pcsPlease note:Please confirm the size before purchasing, thank you.As the parts are small, keep them away from children.Package Contents: 480pcs o ring kitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.