All extensions Unifiber offers are compatible with a winch except the PRO extension line.
The cleats in our PRO Stainless and PRO Aluminium mast extensions only work with 4.0-mm. Formuline ™ and not the original 3.8-mm. diameter line. The ÉLITE Stainless Steel models are supplied with 4.0-mm. Dyneema® line, but have been tested and are compatible with 3.8-mm. rope too.
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