RL-501 For Humminbird 300-700
RL-502 For Garmin GPS MAP 400-600 / Echo 100-550 / Echo Map 50s;
Raymarine Dragonfly Original & Dragonfly7*, Garmin Striker 4 & 5
RL-503 For Lowrance Elite 5 / Mark 5/ Elite 4
RL-504 For Raymarine E7/ E7D + Lowrance HDS-5 / HDS-7 (Gen 1 and 2), Lowrance HDS-9 (Gen 3) and Lowrance Elite 7, 800 and 900 Humminbird Series, B&G Zeus2 7 and Zeus T8
RL-505 For Lifedge Surface Mount Kit, AMPS (Universal)
RL-506 For Raymarine a6 and a7
RL-507 For Garmin GPS MAP 700 Series / Echo Map 70s/ Garmin EchoMap 7 and 9 Series, GPS Map 7407, 7607