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Demanding wing pulley applications call for PPI Quarry Max Wing Pulleys. Designed after the Xtra Heavy Duty Wing Pulley (XHDW), QMW Pulleys feature the same self cleaning action that reduces excessive material buildup. To optimize wing height, larger diameter QMW Pulleys utilize a Mine Duty end disc for added strength and wing stability. Standard contact bar is 3/4" x 2", which accommodates our XHD Fas-lag.