Ronstan Series 40 BB Double Block w/ Swivel Head Hats & Balaclavas Work Wear Mast Stat Opening: 2 1/4"

Mast Stat Opening: 2 1/4" x 13/16" (57 mm x 21 mm)

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Ronstan Series 40 BB Double Block w/ Swivel Head Hats & Balaclavas Work Wear Mast Stat Opening: 2 1/4"Product Description Ronstan Series 40 BB Double Block w Swivel Head Sheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Features: Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Features a swivel shackle head for full 360 rotation Specifications: Sheave 1 9 16 in. (40mm)