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Info:Martin 2BK36 1 1/8 Bored-to-Size Solid Type A FHP Sheave, 1-1/8 in Finished Bore, 3-3/4 in OD, 2 Grooves, 3 in (A/4L)/3.4 in (B/5L) Dia Pitch, 1-3/4 in W Face
Info:Martin 2BK40-H 2BK-H Solid Type A FHP Sheave, 1.378 in MST® Bushed Bore, 3.95 in OD, 2 Grooves, 3.2 in (A/4L)/3.6 in (B/5L) Dia Pitch, 1-3/4 in W Face