Overview Product Description 2MBL77, 7.7" Bushing type, A (4L), B (5L & 5V) belts, SHEAVE,TWO GROOVE (Rim only) Requires Type L "QD" Bushing, Two Groove Sheave, OD 7.75 Inches, 4L or A Belt Pitch Diameter 7.0 Inches, 5L or B Belt Pitch Diameter 7.4 Inches, Cast Iron , same as Browning 2BK80H or Grainger 3X565 Product Videos Custom Field Product Reviews