These fitting kits enable installation of a 2nd station helm or an autopilot pump into an existing Dometic inboard or sterndrive steering system. Some additional parts which are supplied with the helm pump will be re-used.HF5502 Includes:2ea HF5530 Tee -3/8"Tube(M))2ea HF5528 Helm Fitting - 1/4" NPT(M), 3/8" Tube(M)1ea HA5432 No-Vent Fill Plug