The Fremco Multiflow RAPID KIT-B (Millennium part #638982, vendor #103-241105020) is a cable blower accessory kit built to speed up microduct proofing and cable placement on multi-duct fiber optic cable installations. Compatible with Fremco's MultiFlow blowing systems, the kit bundles the inserts, seals, and adaptor components crews need to switch between duct sizes quickly without swapping equipment. Its precision-fit components minimize air loss and cable drag, helping installers achieve longer, more reliable blows on FTTH and long-haul fiber runs. Built to Fremco's exacting manufacturing standards, RAPID KIT-B is a practical upgrade for contractors who need fast changeovers and consistent results across varied duct configurations.