Oregon 70505 - 13/64" (5.2mm) Round Chainsaw Chain Sharpening Files - Box of 12 Challenge Xtreme This bar requires a 72

This bar requires a 72 Drive Link

3/8" pitch (Oregon Type 90PX) with 44 drive links

Stihl 3636 000 0047 / 36360000047 Chainsaw Chain - Picco Micro Comfort 3 – PM3 - 47 Drive Links

As fitted to the Oregon PS250 36V Pole Saw / Pruner

PowerSharp® chain is as durable and hard-working  as other Oregon® 3/8

Oregon 70505 - 13/64" (5.2mm) Round Chainsaw Chain Sharpening Files - Box of 12 Challenge Xtreme This bar requires a 72Oregon 70505 13 64" (5. 2mm) Round Chainsaw Chain Sharpening Files Double cut round file design with precision cutting tooth angles. Removes more material than a single cut file over the life of the file. Superior performance. Smooth filing action. Long stay sharp. Resists clogging. Quantity 12 Files.