This is a replacement wrist pin for the Novarossi family of .21 engines, including the P5, 421B and Plus 21-5. This will work with any Novarossi brand engine including the Top and Rex lines. The wrist pin is the small pin that goes through the piston to attach the connecting rod. You will need wrist pin clips to hold the pin in place.
There is only one wrist pin in the new packages.
This product was added to our catalog on June 17, 2004