Wedge Belts are designated by letters standing for their cross section, e.g. SPA followed by a number e.g. 1600 which specifies the pitch length Lp in mm. Due to their high power ratings savings can be made over classical V-Belts, smaller pulley diameters and less numbers of belts can be incorporated into compact drives. Produced to BS3790 and DIN 7753 and standards. Manufactured in cross-sections SPZ, SPA, SPB & SPC in a range of over 500 lengths.