3" bore, 2" rod, 12-1/8" stroke. Used on 150 series Bateman grapples:.5 cu. yd. (grapple B4T150-050).75 cu. yd. (grapple B4T150-075)1.0 cu. yd. (grapple B4T150-100)1.25 cu. yd. (grapple B4T150-125)1.50 cu. yd. (grapple B4T150-150)0.6 cu. yd. (grapple B5T15-075)0.76 cu. yd. (grapple B5T15-100)1.0 cu. yd. (grapple B5T15-125)Used with replacement seal kit BMF-BN1534SK and replacement cylinder guard part number LD6482.