The PMD900A is a 900mm length extension unit which can be added on the floor tom side or the left side of double bass drum setup. 900mm Curved Pipe (f38.1) x 1pc 850mm Straight pipe w/f19.1mm Joint (f38.1) x 1pc 40mm x 20mm x 450mm Square pipe x 1pc Leg Joint Bracket x 1pc Rubber foot x 2pc Cross Joint Bracket (J30TS) x 2pc Multi Holder (J34T) x 1pc Memory Lock (A13S) x 3pc