Assorted Rubber O-ring Set With Case. Features: Made of High Quality Rubber Material These O-rings Are Durable and Has Longer Service Life. They Are Wearable Corrosion Resistant and High Temperature Resistant. There Are 32 Different Sizes of O-rings in This Set That Can Meet Your Different Need. Total 419 Pieces So You Do Not Have to Worry About Running out of O-rings for Quite a While. They Can Be Widely Used for Sealing for Valves Cars Pumps Electrical Equipment Bearings Etc. Specifications: Material: Rubber Type*Qty*Inner Diameter*Section Thickness: R-01*20pcs*3mm*1.5mm R-02*20pcs*4.4mm*2mm R-03*18pcs*5mm*2mm R-04*23pcs*7mm*1.5mm R-05*23pcs*10mm*1.5mm R-06*23pcs*13mm*1.5mm R-07*14pcs*10mm*2.5mm R-08*13pcs*11mm*2.5mm R-09*14pcs*13mm*2.5mm R-10*13pcs*14mm*2.5mm R-11*14pcs*16mm*2.5mm R-12*14pcs*18mm*2.5mm R-13*13pcs*19mm*2.5mm R-14*14pcs*21mm*2.5mm R-15*13pcs*22mm*2.5mm R-16*10pcs*18mm*3.5mm R-17*10pcs*20mm*3.5mm R-18*10pcs*22mm*3.5mm R-19*10pcs*23.5mm*3.5mm R-20*10pcs*25mm*3.5mm R-21*10pcs*26.5mm*3.5mm R-22*10pcs*28mm*3.5mm R-23*10pcs*30mm*3.5mm R-24*10pcs*31mm*3.5mm R-25*10pcs*33mm*3.5mm R-26*10pcs*34.5mm*3.5mm R-27*10pcs*36mm*3.5mm R-28*10pcs*38mm*3.5mm R-29*10pcs*41mm*3.5mm R-30*10pcs*44mm*3.5mm R-31*10pcs*47mm*3.5mm R-32*10pcs*50mm*3.5mm Package Includes: 1 Box * O-rings .