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You are here: Home > Sailboat Hardware > Blocks > Ronstan Blocks
Ronstan Series 20 Blocks
20mm blocks for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 30 Blocks
30mm blocks ideal as primary lead blocks on dinghies and catamarans and as control lines on larger yachts.
Ronstan Series 40 Blocks
40mm blocks suitable for mainsheet, halyard, vang and spinaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 26 ft.
Ronstan Series 50 Blocks
50mm blocks ideal for mainsheets, spinnaker sheets, halyards and other primary applications on boats up to 33 ft.
Ronstan All-Purpose Blocks
A great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
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Ronstan Series 20 Block, Single
Ronstan Series 20 Block, Single with Swivel Shackle Head
List Price: $15.71
Our Price: $13.35

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Single
Ronstan Series 20 Block, Single with Loop head
List Price: $9.72
Our Price: $8.26

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Single
Ronstan Series 20 Block, Single with Becket/Loop Head
List Price: $11.35
Our Price: $9.65

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Stand-Up
Ronstan Series 20 Block, Stand-Up
List Price: $14.97
Our Price: $12.72

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Double
Ronstan Series 20 Block, Double with 2-Axis Shackle head
List Price: $21.17
Our Price: $17.99

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Double
Ronstan Series 20 Block, Double with Becket/2-Axis Shackle head
List Price: $22.69
Our Price: $19.29

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Double
Ronstan Series 20 Block, Triple with 2-Axis Shackle head
List Price: $29.36
Our Price: $24.96

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Cheek
Ronstan Series 20 Block, Cheek
List Price: $11.71
Our Price: $9.95

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 20 Block, Upright Lead
Ronstan Series 20 Block, Upright Lead
List Price: $14.76
Our Price: $12.55

Sheave diameter: 20mm (3/4"). Perfect for dinghy control lines, dinghy vangs, cunninghams and traveller controls.
Ronstan Series 30 Block, Single
Ronstan Series 30 Block, Single with Swivel Shackle Head
List Price: $17.70
Our Price: $15.05

Sheave diameter: 30mm (1-3/16"). Ideal as primary lead blocks on dinghies and catamarans and for control lines on larger yachts.
   
 
Svendsen's Marine
1851 Clement Avenue
Alameda, CA 94501
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