Here is the whole set. It's the con rod installed in the piston, and the sleeve.
http://www.amainhobbies.com/product_...-3L-N21B-T21BF
It makes life so much easier to buy it like this, however, if you need help puting it together or want the engine checked over, you may need a new front bearing for example, you might want to contact Monty at Houston's engine Service. He is a real nice guy who specializes in Novarossi engines.