The Aqua-flo XP2e 2HP 48f Wet End Assembly (2×2).  This unit includes the housing, the face plate, the face plate o-ring, the 2.0hp impellor and the ceramic seal kit. This unit also includes a built in bleed screw.  The space between the impellor plates is 7mm.

Dimensions:

Length: 200 mm
Width: 185 mm (main face diameter not screw holes)
Depth: 140 mm