Hot Racing Traxxas M41 Aluminum Adjustable Trim Tabs. Features: Adjusts angle of trim tab assembly for proper hull planing CNC machined aluminum construction Pre-drilled holes for easy mounting Anodized blue for durability, corrosion resistance, and great looks Specifications: Weight: 0.78oz Length: 33mm (1.30 inches) Width: 30mm (1.18 inches) Height: 24.5mm (.96 inches) NOTE: Uses the stock 4x12mm screws to mount on boat.