Just looking at masterpart and they are selling the whole complete drum assy cheaper than a back half on its own , i dont undestand the logic in that one.
6KG the thing is martin is not a sealed drum, its a complete drum assy all assembled with front, back, inner drum and spider screwed together with a heater and and susp pins thrown in, for £79 its a good deal, part n/o is 1603410