Severne Race SDM HD Aluminum Extension

Severne SDM Aluminum extension with 3 rollers. The third roller is the key to be able to use all 4 rollers on the sails downhaul block, from higher tension sails like the NCX, Moto, Hyper and Mach. Can easily be used with other models, like the Gator, that only have 3 rollers by simply skipping one of the extensions rollers.