Blocks by Range

Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. Sheave: 22 mm / 7/8 in Length: 102 mm / 4 in Weight: 57 g / 2 oz Shackle pin: 5 mm / 3/16 in...

The Ronstan 15 mm Utility Block range offers small boat sailors a lightweight, stainless steel block range for a variety of applications such as control lines and shockcord tension systems. This single block features a swivel head with removable shackle...

The Ronstan 15 mm Utility Block range offers small boat sailors a lightweight, stainless steel block range for a variety of applications such as control lines and shockcord tension systems. This is the basic loop head type single block, great for lashing...

This is the smallest and lightest Ronstan ball bearing block available. A Precision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction. This single loop head block includes an O-ring to separate...

The 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. The...

The 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. This...

The 16 mm is Harken’s smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. ...

The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load...

Harken soft-attach Fly blocks are designed to provide strength without mass, providing sailors with big power in a low-aero package. Designed specifically for high-tech line, these efficient blocks have an incredible working load for their small size...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Highly efficient, low friction bearing systems for...

The new Ronstan 20mm 'Orbit' block is small and compact. Super lightweight and strong! Made from advanced fibre and polymer technology, these blocks are ten times stronger than steel. 20mm Ball Bearing block  Lightweight - Just 9 grams! High...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Highly efficient, low friction bearing systems for...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Highly efficient, low friction bearing systems for...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Has a low profile swiveling hook for quick and easy...

The Ronstan 20 mm Utility Block range featues stainless steel cheeks and Acetal sheaves for a long service life with virtually no maintenance. This ferrule top version features a narrow attachement point for small spaces. Hollow rivets in the block heads...

The Ronstan 20 mm Utility Block range featues stainless steel cheeks and Acetal sheaves for a long service life with virtually no maintenance. This single block version features a standard loop top for lashing or connection via shackle or other hardware...