0My Cart

Product was successfully added to your shopping cart.

Ronstan Series 30 Exit Box Ball Bearing Double Block

Cat.No:  5959 Sup. No:  RF30721

Availability: In stock

RRP: $50.86

our price $45.95
Home Delivery Delivery Information
Shipping Rates:

Precision moulded Acetal sheaves running on Acetal ball bearings provide high performance & low friction.

The 2-stage ball bearing system provides consistent performance over the full load range.


  • Sheave Diam: 30 mm
  • Max. Rope Diam: 8 mm
  • Fastener Diam: 5.0 mm
  • Max. Wire Diam: Not suitable
  • Max. Working Load: 300 kg
  • Breaking Load: 750 kg
  • Weight: 35 g


  • Exit blocks minimise friction in lines passing through the deck or exiting masts and booms


  • Acetal ball bearings
  • UV stabilised Acetal sheave
  • Grade 316 stainless steel load straps
  • Impact and UV resistant, fibre reinforced Nylon cheeks

Australia's largest marine accessories retailer. Serving boat owners since 1962. With sixteen big supermarkets and mail order departments Australia wide Whitworths Marine & Leisure offers the best service, convenient locations, a huge selection of quality products, and unbeatable prices.