Timing Belt Compatible with Singer Brand Home Sewing Machines. This timing belt measures 18-1/4 inches and has 91 teeth. Compatible with Singer models :240, 241, 242, 247, 247AP, 248, 249, 250, 251, 252, 257, 258, 259, 263, 288, 350, 353, 354, 360, 362, 366, 367, 547, 563, 588, 1247, 1263, 1280, 1288, 2302, 2303, 2304, 2315, 2330, 2404, 2440, 3100, 3101, 3102, 3103, 3105, 3130, 3140, 4325, 6012, 6174, 6305, 6310, 6314, 6318, 7100, 7101, 7184, 9502, 9505, 9602, 9605, 9610, 9614, 964, 966, 968, 972, 974, CE-350 Futura III