Clone-A-Willy Jet Black is a DIY casting kit for creating a detailed, vibrating replica of a penis in bold black silicone. The kit uses an algae-based moulding powder and a moulding tube measuring 2.5 inches wide by 11 inches tall, allowing the shape and detail of the original to be reproduced for a personalised adult novelty.

Included components comprise the moulding materials, silicone, a single-speed vibrator, instructions and a how-to DVD. The finished replica is designed for an individual experience with straightforward casting steps: prepare the mould, create the replica and allow it to cure before removal. The silicone is phthalate-free and made with non-toxic materials. One AA battery is required for the vibrator and is not included.