DOP20BPX066GHL Loop-Saw Chain. 20 Series MicroChisel® .325 Pitch, .050 Gauge, 66 Drive Links. Fits Homelite model 240, 25, 27, 4100, 4150, 4500, 4550, d4550b, i4150b, i4550b, Super 240, Timberman, UT 10896, UT 10910, UT 10518, UT10550, UT 10552, UT 10927A, UT10942A, UT10946A, ZR10518, ZR10520 Chain saws. Replaces 33SL066G.