The original Toneoptic rpm wall mounts ship in pairs (2 wall mounts per order – enough to mount one rpm unit) and are compatible with any rpm.
Bought a bottom-mount rpm and realized you'd be better off wall-mounting it? Changed your room layout? Moved to a new place? Damaged your wall mount?
…then this is the accessory for you that transforms any bottom mount rpm into a wall mount rpm instantaneously.