Paddle wheel aerator 1hp & 2hp(coming soon !! ) (all other spares are available) 1High performance, study, durable & cost effective 21 hp motor, gearbox phosphor bronze gears 3Impeller with removable blades with a hub/bush, which is non-magnetic. 42 hdpe floats with 1730mm length, which gives perfect balance. 51 hdpe motor cover with uv treatment 61hp & 2hp frames made of 304 quality stainless steel Standard