The RMPR400B-2 is a dual rack mount kit for a single R400a-Ver2 Receiver (receiver not included in RMPR400B-2 Kit). The brackets and couplers are symmetrical so the receiver can be mounted on either the left or right side of the rack.
Dual rackmount kit for a single R400a-Ver2 receiver
Receiver not included in RMPR400B-2 kit
Brackets and couplers are symmetrical so the receiver can be mounted on either the left/right side of the rack