... , L, H.. 3.SGS-ROHS,ISO9001:2000 timing belt Polyurethane(PU) Timing Belts(Open End and welding) MXL, XL, L, H ... the KNITTING LARGE DIAMETER CIRCULAR KNITTING MACHINESpecification as below: Section Product width Packing/rollS3M 10mm---100mm 100meter/rollT5 10mm---100mm 50meter ...