Dynapac Drum Mount Our rubber Dynapac drum mount or sandwich mounts are made from a high-quality rubber vulcanized to a steel plate; we stock a wide range of isolator buffers to suit most rollers. Complete your rubber buffer with a bolt kit to suit that roller you are replacing the drum mounts on. Dynapac Part Number 4700358172 To Suit Dynapac CA702 CA612 CA610 CA602 CA600 CA512 CA551D CA511 CA510 CA500