Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount Boat J/88 It also comes with a

It also comes with a clip designed to slide over an inflatable life jacket's oral inflation tube for convenient storage

To check you thread

The proven Ronstan 2-stage bearing system (Series 30 and larger) features high compression grade Acetal ball bearings and a secondary full-contact bearing

Bag made of quick-drying nylon

Single loop head blocks include an O-ring to separate running line from head lashing or fixing

Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount Boat J/88 It also comes with aSeries 20 Ball Bearing Block Single Cheek Rivet Mount Features: Low friction High static and dynamic load capacity Lightweight Suitable for screw or pop rivet mounting Precision molded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance & low friction Applications: Dinghy control lines Dinghy Vangs Cunninghams Traveller controls Materials: U. V. Stabilized Acetal sheaves Stainless steel ball bearings Grade 316