Check the listing for details. LABLT 740 Pack O-ring Set in 24 Sizes With 4 Tools Nitrile Rubber Oring Kit. Color: 740pcs Metric with Tools, Condition: New, Made in United States. Listed at 15.72 USD. Description:MULTIPLE SIDES: Assorted rubber washer gasket oring set in 24 different size with OD of 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. Have thickness of 1.5mm, 2.4mm, 3.1mm. Those size could meet most daily needsHIGH QUALITY RUBBER: Black o rings set are made of high quality nitrile rubber. It has high force pressure over 30kg. The working temperature range is from -55 to 150℃(-131°F to 302°F); The black o ring kit also has good characteristic on oil resist, wear resist and cause no leak after applying to the fittings;TOOLS INCLUDED: Rubber O Rings Kits comes with 4 piece pick hook set, 1-piece straight pick, 1-piece 45 degree pick; 1-piece 90 .