SYNTHETIC RUBBER TIMING BELT. CONFORMS TO RMA ENGINEERING STANDARD. TIMING BELTS ARE MEASURED BY LENGTH, TOOTH PITCH, THEN WIDTH. THE FIRST NUMBER IS THE LENGTH; THE LETTER AND SOMETIME NUMBER REFER TO THE TOOTH AND THE FINAL NUMBER IS THE WIDTH. STANDARD TIMING TOOTH PROFILE, H; FIBERGLASS TENSIILE MATERIAL; RUBBER OUTER MATERIAL--JAS730H200 >