Oregon 557502 16" Single Rivet Bar and 91PX 3/8" Chain Gauge, Saw Chain Combo 91PX055G Saw Chain - Pitch: 3/8" low profile, Gauge: .050", Drive Link Count: 55; 160SDEA074 - 16" Guide Bar features small Radius nose to help reduce kickback Bar mount used on select olympyk, Stihl Saws Oregon lubritec design keeps your chain and guide Bar Oiled, for less friction and extended usage. The chamfer chisel cutters offer outstanding performance and are durable, easy to maintain and forgiving For saw Sizes up to 42 cc