Clew Blocks: Symmetrical both sides
Reefing Blocks: One side is flat so that it can lay flat against the sail.
Our range of clew/reefing blocks are unsurpassed for quality and performance. The bearing system has been engineered to provide smooth running reliability under the most demanding conditions, whilst the aluminium alloy side plates provide strength without adding excessive weight. Both the clew and reefing blocks are available in 4 sheave sizes.
| Part Number | Sheave Diameter mm | Max Rope mm | Webbing Size mm | Boat Size m |
| 04-87RB | 42 | 8 | 20 | 7m - 10m |
| 04-88RB | 50 | 10 | 30 | 7m - 12m |
| 04-90RB | 70 | 12 | 30 | 10m - 16m |
| 04-92RB | 100 | 14 | 50 | 14m - 18m |
| 4.87 | 42 | 8 | 20 | 7m - 10m |
| 4.88 | 50 | 10 | 30 | 7m - 12m |
| 4.9 | 70 | 12 | 30 | 10m - 16m |
| 4.92 | 100 | 14 | 50 | 14m - 18m |
