Blocks

25mm Single Block with V-JamThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and...

Series 40 Ball Bearing Block - Single - Universal HeadSheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive...

Series 40 Ball Bearing Orbit Block™ - Single - Becket - Swivel HeadCore Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing...

16mm Block with SwivelThe 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...

25mm Double Block with ShackleThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and...

Series 40 All Purpose Block - Single - Stand UpAll 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...

Hasp & Staple - 78mmThis hinge was fabricated from marine-grade 316 stainless steel and electro-polished for a long-lasting high finish. Features:The pins of the hasps and staples are welded in place for added securitySpecifications:Closed...

22mm Double Micro BlockLow-friction Micro blocks are compact and lightweight. Specifications:Sheave: 22mm / 7/8in.Length: 51mm / 2in.Weight: 43g / 1.5oz.Maximum line: 6mm / 1/4in.Maximum working load: 159kg / 350lbBreaking load: 544kg/ 1200 lb

16mm Double BlockThe 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.Specifications:Sheave: 16mm /...

40mm Carbo Air Cheek BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming...

40mm Carbo Air Block with SwivelLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy...

22mm Double Micro Block with BecketLow-friction Micro blocks are compact and lightweight. Specifications:Sheave: 22mm / 7/8in.Length: 64mm / 2.5in.Weight: 43g / 1.5oz.Maximum line: 6mm / 1/4in.Maximum working load: 159kg / 350lbBreaking load:...