Aeromarine is now offering all-aluminum 750 straight floats.
The floats weigh only 30 lbs. each and are perfect for Part 103 ultralights. Available in finished or in a quick build kit.
A little bit of History
Aeromarine, meaning basically me, have a long history with seaplanes. I obtained my seaplane rating in a 1941 J3 Piper Cub on straight EDO floats in 1991. But by then I already had a few hundred hours flying floatplanes. Back up to around 1981 when I installed floats to the Tomcat ultralight and figured out how to fly a canard 2-axis floatplane. There is a video of it on my YouTube channel. Back when I had more hair and less sense.