CA408 | 408pc Metric O-Ring Assortment Master Kit Nitrile 70 Shore 32 Sizes 3mm to 50mm I.D. 408 Pieces The best fuel resistant gasket material for gasoline is Nitrile (Buna-N) a closed-cell sponge rubber material that provides excellent gasket material for sealing applications that require resistance to gasoline oil fuels as well as solvents hydraulic fluids and mineral and vegetable oils. Replacement Packs Available Part# I.D. Section Pack Qty C408-1 3mm 2mm 20 C408-2 5mm 2mm 20 C408-3 6mm 2mm 20 C408-4 8mm 2mm 20 C408-5 10mm 2mm 20 C408-6 13mm 2mm 20 C408-7 10mm 2.5mm 15 C408-8 12mm 2.5mm 15 C408-9 14mm 2.5mm 15 C408-10 15mm 2.5mm 15 C408-11 16mm 2.5mm 15 C408-12 18mm 2.5mm 15 C408-13 20mm 2.5mm 15 C408-14 21mm 2.5mm 15 C408-15 22mm 2.5mm 15 C408-16 18mm 3.5mm 10 C408-17 20mm 3.5mm 10 C408-18 22mm 3.5mm 10 C408-19 23mm 3.5mm 10 C408-20 25mm 3.5mm 10 C408-21 27mm 3.5mm 10 C408-22 28mm 3.5mm 10 C408-23 30mm 3.5mm 10 C408-24 31mm 3.5mm 10 C408-25 32mm 3.5mm 10 C408-26 34mm 3.5mm 10 C408-27 36mm 3.5mm 10 C408-28 38mm 3.5mm 10 C408-29 41mm 3.5mm 10 C408-30 44mm 3.5mm 10 C408-31 46mm 3.5mm 10 C408-32 50mm 3.5mm 10