Ul-19 lightweight carbon fiber tray designed by Krazed Builds. Now produced by Offshore Electrics. Features:-This will reduce the overall hull weight by approximately 7 ounces.-Reinforce the hull floor.-Allows for more movement of lipo packs, which allows for better tuning/weight distribution.Includes:(1) Carbon Fiber Battery Tray(3) 3D Printed Spacers(1) Rectangular 3M Adhesive Foam Pad (Ama-1000)(2) 3mm x 6mm Hex Head Screws (mc-91292a111)(20") 2" Velcro (hd-velcro2)