I added twin traps to a Prindle 16, total cost was about $125, for the 4 wires, 4 handles, lines for all and bungie cord to hold it all together. I bought it from http://www.Murrays.com they have all the factory stuff for most cats but without knowing what you have for a boat, we can't know what length wires you need. You might also find it at the Catsailor online store here on this site, upper right corner. You can install it all yourself in about 20 minutes, free.