Ronstan Series 50 All Purpose Block - Single - Universal Head [RF51100] Marine Plumbing & Ventilation | Transfer Pumps *The above item meets the

*The above item meets the requirements of U

One piece vitreous china bowl

Proportional shift delays

Series 40 Ball Bearing Block - Single - Universal Head

Replaces Jabsco 17937-0001 Europe & USA

Ronstan Series 50 All Purpose Block - Single - Universal Head [RF51100] Marine Plumbing & Ventilation | Transfer Pumps *The above item meets theSeries 50 All Purpose Block Single Universal Head All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Captive Lock universal head can be fixed in either of