Structure and Material NoNameFunctionMaterial 1Upper fabricSynthetic fabric containing special rubber layer ensures good heat resistance, oil resistance and wear-abilityPolyeste cotton canvas 2Adhesion rubberStrong thermo tolerance and oil resistance, and super strong cohesion between core wire of tensile body and rubber teeth.CR/EPDM 3 High tensile body (core wire)Heat-treated core wire makes it can endure high shock loading. Polyester 4Upper core rubber(RIBS) Fortifying fiber of core rubber provides good side pressure ability and wear-ability. CR/EPDM Dimension of Ribbed V Belt TypeRib SectionAngle Of RibThickness Rib NumbersLength Range PH1.64032-60250-4470 PJ2.34403.92-60250-4770 PK3.56404.83-40400-4470 PL4.740103-32700-4720 PM9.440173-16800-4720 DPK3.56407.06-40500-4470 Advantage of fan belt pk belt: Conditionally resistance to oil Temperature range, depending on application, from -20oC to +140oC Suitable for tropical climate Resistance to aging and ozone Maintenance free Suitable for counter-bending Features & Benefits: Trapezoidal tooth profile High efficiency due to positive engagement between belt teeth and pulley grooves No re tension required No high tension required Poly V belts are single, endless belts with V-Shaped Ribs that work with the Grooves in your pulleys. Providing a smooth running and Low noise Operation at high Speeds. The Poly V Belt offers the advantage of a strong gripping traction. Used in applications such as Farm Equipment, Power Tools, Conveyors, Fan assemblies and industrial machinery.PK Poly V Belt price website:http://www.feilizhoubelt.com/ribbed-belt/pk-poly-v-belt/