Emerson & Cuming
Ecco Float rated 2900 ft
These elements are 37.25" OD when mounted onto a 21" OD riser.
They are rated for 2900 ft water depth (max), or 0 to 2900 ft service.
The nominal uplift (buoyancy) per half is 1219 lbs and the nominal air weight per half is 861 lbs