38 mm Aluminum Rocket Motor Retainer for Madcow and Rocketarium paper, PML and GLR phenolic, Hawk Mt, Performance Rocketry and Madcow fiberglass (1.65" OD)

• Precision Machined 6061-T6 Aluminum With Mil-Spec Type II Black Anodizing
• Large Quick-Turn Threads For Fast, Tool-Free Motor Change
• Installation: Simply Bond To Motor Mount Tube With JB Weld And You`re Done!
• Just Slide Motor In And Thread On Cap, That's It!
• Can Be Installed On Existing Rockets With Motor Mount Tubes Extending 3/8" Or More Below Lower Centering Ring