1: available in two cross-sections:k, j. both of them are for driving generators, fans, water pumps, a/c compressors and power steering etc, 2: available in standard rib sturctures and sizes, with lengths from 18 inches to 361 inches (ribs from 2-15 pk/pj…) but also depending on the cross-section. special sizes and constructions are available on the request.. 3: available in matt-finishing and glossy-finishing cover with different “flat or v” sheaves groove. they are extremely smooth running and highly resistant to oil, heat and other adverse conditions. 4: guaranteed 60,000-80,000km. please chose the good one by msn:aproautoparts1.hotmail.com