Ronstan Series 40 BB Double Block w/ Swivel Head Hats & Balaclavas Work Wear Dynamic Dollies Gunwale Upgrade Kit

Dynamic Dollies Gunwale Upgrade Kit for RS Aero Dollies

Touch Screen fingers & thumb

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

B- 17/32 inch

Ronstan Series 40 BB Double Block w/ Swivel Head Hats & Balaclavas Work Wear Dynamic Dollies Gunwale Upgrade KitProduct 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)