Each Kit comes with everything you need: Body safe "neon purple" silicone, one bag of algae based molding powder, one molding tube unit, and one 5" vibrating unit.
If your penis is 9" or larger, you'll need to use an XL vibrator (7") and may need extra silicone. If you'll want to make a non-vibrating dildo, you'll definitely need extra silicone.
Mix the molding powder with water. Insert your willy into the tube. Easily pull away mold and fill with rubber mix. Slide out a copy of your own willy.