For a limited time, purchase a SI-TEX NavPro 900F or NavPro 1200F with your choice of professional grade Echonautics thru-hull transducers and get serious bucks back from SI-TEX! Take your cruising and fishing to new levels by pairing a NavPro with a low-profile thru-hull, standard bronze thru-hull or premium stainless steel thru-hull (both available with optional high-speed fairing block). Better yet, upgrade to any Echonautics CHIRP transducer for the ultimate in performance and savings.