Yamaha RS130 Electronic Drum Assembled Curved Rack System for DTX900K,790K Large 3-leg Aluminum Tube design with support bars (1.5-Inch diam.) Large 3-leg Aluminum Tube design with support bars (1.5-Inch diam.) TPCL150 Yamaha ball-joints provide superior tom positioning Ridged tubing for added strength  supports additional pads/cymbals