O-RING SET, METRIC, MATERIAL FLUOROCARBON, NUMBER OF PIECES 500, NUMBER OF SIZES 36, DUROMETER 75, HARDNESS HARD, SIZES INCLUDED (10) EACH OF 010, 013, 014, 015, 017, 018, 019, (10) EACH OF 014, 016, 019, 020, (10) 016, (10) EACH OF 009, 010, 011, (15) 013, (15) EACH OF 4.3, 5.3, 5.6, 7.6, 8.3, 8.6, (15) EACH OF 008, 009, 010, 012, (15) EACH OF 9.1, 10.1, 13.1, (20) EACH 004, 006, (20) EACH OF 2.2, 3.1, 4.1, 7.1, (20) 005, CASE TYPE PLASTIC BOX W