Estes EST2252
Engine Plugs for C11 D12 E9 E16 or F15 Model Rocket Engines
Included are 20 each of the white plugs for D12 and 29 mm E and F engines and black plugs for C11 and 24 mm E engines.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov