This is a Two-Piece 3/16" Maxi Launch Rod for Mode Rockets from Estes. FEATURES: Extra strength and stiffness for larger rockets. Heavy duty launch rod for "D" engine, and heavy rockets. Includes safety key and safety cap. Fits all Porta-Pad launch pads. INCLUDES: One Two-piece 5mm (3/16") rod. One Safety cap. One Safety key. One Cord. Complete instructions. SPECS: Length: 18" (45.7cm) Diameter: 3/16" (5mm)