... stable transmission, high efficiency and compact transmission with p narrow v-belt, Especially available for transmission devices of motive force in ... high working speed transmission. Also suitable for transmission of general motive force.Narrow V-BELT includes TYPE: SPA, SPB, SPC, SPZ, ... 3VX, 5VX, 8VX, 3V, 5V, and 8VNarrow V-typebelt: It is made up of wrapping layer, stretching layer ...