Rubber belt set for tape recorder repair, small diameter and thin. Also suitable for watch O-rings, with a thickness of 0.7-0.8mm. Dimensions (diameter in mm, approximate) 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31 Please choose 6 belts from the above. Up to 3 of the same diameter. Please comment beforehand to check stock. There may be slight variations in size. They will stretch when installed even if they appear twisted. Depending on stock, additional belts can be added for 25 yen each (22mm is 30 yen). Can be shipped with other items. 80 yen discount. Please comment beforehand.