75 mm Retainer Base for Blue Tube, PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass motor tubes. (3.125" OD)

• Light-Weight Body Only, For 75mm Motor Mount Tubes "P"
• 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 3/4" Or More Below Lower Centering Ring