380 pc Buna-N o-ring kit contains 30 popular sizes, from -006 to -327. Typical static or dynamic applications include gasoline, jet fuel, water-based hydraulic fluid, glycols, etc. Temp range: -65 degrees F to +285 degrees F. Duro: 70. Meets MIL-G-21569B, cls 1 for general purpose use, AS568A, & ASTM D2000 2BG 720 EA14 EO14 EO34. Made in U.S.