Genuine Original Equipment Manufacturer (OEM) parts! High-lift blade 138971 is an original equipment manufacturer (OEM) part that fits some Craftsman, Murray, Ryobi, Poulan, Ariens, Companion and Southern States lawn tractors. High-lift blade 138971 fits a dual-blade 42-inch mower deck. Two blades are required; each blade is 21 inches long, 2.25 inches wide and 0.15 inches thick. Angled tips on this blade lift and eject grass clippings from the mower deck for discharge or bagging. Replace both blades at the same time to ensure an even cut. Replaces original lawn tractor high-lift blade part numbers 138498, 138971X431 and 532138971. Fits some lawn tractors in the following series: Craftsman 917 and 944; Murray 425, 960 and MS18; Ryobi 960 and HDK; Poulan 917, 960, BB18, BB24, C20, DB18, HD20, HD21, PB, PD, PK, PP, PPR, PR, PRK, PXT and XT; Husqvarna 250, 917, 960, YT, YTA and YTH; Ariens 571, 935, 936, 960, A17, A18, A19 and A20; Companion 917; Southern States 960, SO and SP; Weedeater 440 and HD; and YardPro Y14542.