The Oregon 90PX100U AdvanceCut Saw Chain reel contains 100 feet of 90PX chain, an ideal choice for landscapers and homeowners who use small, low powered saws. The .043" gauge narrow kerf cutting systems increase efficiency since they need less power from the saw than standard cutting systems. The low-vibration low kickback Chamfer Chisel cutters' have twin cutting corners which offer outstanding performance. Similar to round corners, these twin cutting corners are durable, easy to maintain and forgiving. Compatible fit with Stihl 61PMM3 100R. Replaces many OEM parts, including but not limited to the following: Stihl - 61PMM3 100R.