Ronstan Series 15 Ball Bearing Utility Block - Pivoting Lead Block [RF15174] Automotive/RV | Sanitation Now they are used for

Now they are used for securing a wide range of wire clamps and other small components to composite surfaces

anti-siphon valve

polyurethane finish that won't turn yellow in the sun

suited for a variety of applications and widely used for outrigger mounts

high impact ABS plastic and unique threaded port design

Ronstan Series 15 Ball Bearing Utility Block - Pivoting Lead Block [RF15174] Automotive/RV | Sanitation Now they are used forSeries 15 Ball Bearing Utility Block Pivoting Lead Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction Single loop head blocks include an O ring to separate running line from head lashing or fixing Featuring a 4 point fastening for load distribution and low profile. Can be mounted without disassembly. Applications: Dinghy