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Duotone RDM Mastcup.
RDM ‘0’ adjustment Base Cup Model, Simple. Durable. Functional. For a fast and easy way to enjoy hours on the water here’s your chance to buy quality at an affordable price.
When your sail does not require a mast extension you can rig it using a base cup.
• 3 Pulley base
• Durable increased wall thickness
• Small entry hole to clamcleat