Blocks - Single

Ronstan's All Purpose (AP) blocks are a great all-round solution. With Acetal polymer sheaves this single block with swivel and becket is available in 2 sizes. Features: 316 Stainless Steel polished bearing races, load straps and head...

Ronstan's All Purpose (AP) blocks are a great all-round solution. With Acetal polymer sheaves this single block with becket and loop is available in 2 sizes. Features: 316 Stainless Steel polished bearing races, load straps and head Low...

Ronstan's Orbit Blocks are a great all-round solution boasting the highest strength-to-weight ratio available.  The incredible Series 20 Orbit Block™ is capable of loads up to 250kg (550lb) while weighing only 9 grams.   With a simple...

Ronstan's All Purpose (AP) blocks are a great all-round solution. With Acetal polymer sheaves this single block with loop is available in 2 sizes. Features: 316 Stainless Steel polished bearing races, load straps and head Low friction, 2...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)110mmLength (mm)157mmWeight (g)1121gMaximum line ∅ (mm)20mmMaximum...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)104mmLength (mm)142mmWeight (g)768gMaximum line ∅ (mm)20mmMaximum...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)82mmLength (mm)113mmWeight (g)413gMaximum line ∅ (mm)16mmMaximum...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)62mmLength (mm)96mmWeight (g)282gMaximum line ∅ (mm)14mmMaximum...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)62mmLength (mm)86mmWeight (g)203gMaximum line ∅ (mm)11mmMaximum...

The TTR (Titanium Roller) AirBlock surpasses all other blocks with 98% efficiency, increasing trimming speed and harnessing power other blocks lose to friction.Sheave ∅ (mm)56mmLength (mm)79mmWeight (g)127gMaximum line ∅ (mm)10mmMaximum...

Stainless sideplates are mirror-polished for durability and unmatched aesthetics. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads. Note: DO NOT use Harken equipment for...

Stainless sideplates are mirror-polished for durability and unmatched aesthetics. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads. Note: DO NOT use Harken equipment for...

Stainless sideplates are mirror-polished for durability and unmatched aesthetics. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads. Note: DO NOT use Harken equipment for...

Stainless sideplates are mirror-polished for durability and unmatched esthetics. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads.Sheave ∅ (mm)175mmWeight (kg)5...