... China, more than 40 years production experience. Rubber Ribbed BeltTypes:1) PH: pitch 1.6, belt thickness 3, wedge angle 402) PJ ... : pitch 2.34, belt thickness 4, wedge angle 403) PK: pitch 3.56, belt ... .7, belt thickness 10, wedge angle 405) PM: pitch 9.4, belt thickness 17, wedge angle 40Advantages: Transmission power ...