This is a 2 inch Gate Valve Male-Female.  It is commonly used with 2 inch rigid pipe and 2 inch flexible rigid pipe.

This part is used to isolate a section of pipe work, usually it is to be able to gain access for maintenance purposes.

Outer Length: 115 mm
Outside Height: 220 mm
Outer Depth: 59 mm (male end) 69 mm (female end)
Internal Diameter: 52 mm (male end) 60 mm (female end)