Ronstan's 20mm stanchion block enables furling lines to be lifted off the deck and led aft. The 20mm ball bearing sheave is suitable for up to 12mm line and ensures friction ins kept to a minimum. Suitable for 25mm stanchions.
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Specifications
| Recommended line - Max Ø (mm) | 12 |
| Stanchion Ø (mm) | 25 |
| Sheave Ø (mm) | 20 |
| Sheave material | UV stabilised acetal |
| Weight (g) | 30 |
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