Looking for Timing Pulleys, S3M (3mm pitch): Material: Nylon. the dimensions are: 3mm bore, 4mm belt width, hub length 0.18", hub diameter 0.50". The setscrew is 4-40 x 1/8". Teeth number: 15T, 18T, 22T, 26T, 30T, 34T, 38T, 42T, 46T, 50T. Looking for pricing, sample delivery, minimum order quantities.