Set of 2 BRAND NEW Carburetor Diaphragms (only the rubber parts). It does not include anything else than that. They would fit stock Keihin CVK30 carburetors. THEY WILL NOT FIT MIKUNI AND HITACHI CARBS! These are definitely the best quality aftermarket replacement parts you can find on the market and they are petrol, ethanol and chemicals resistant. You can find many guides, shots and videos in internet how to change these but it just looks easy. Please, believe me… it is not. The parts are very fragile and delicate so we strongly advise the change to be done by professional. If you are not sure about the measures of the diaphragms you need or you have any doubts please get in contact with us and we will discuss it to avoid further troubles for either you and us. Thank you!