1.Main Type: PK Belt SPA 2.Specification:Top width:13mm;Thickness: ... certificate.Plain v-belt: FM(9.5),Z,O,A,B,C,D,E,F,SPZ,SPA,SPB,SPC, 3V, 5V,8V,14X10 ... total power transmission with a very low elongation rate and high resistance to fatigue.Compression element:A compound prepared to resist ... belt. It also offers better flexibility to the system, and better adjustment of the belt to the pulley.Wrapped V ...