This is the Hyper Performance 3.5 Bullet Drive Housing.
 
This item includes only the 3.5 Outboard Housing Only. No inner parts are included.

Requires:
hpi-psa35 Shaft assembly
hpi-dc1563s2 Flex Cable
hpi-obmm35 Outboard Mount
hpi-eobck35-5mm Electric Motor mount and Coupler.