Standard tails are made with an elastic loop at the top. They come with matching ribbon to tie through for immediate, external wear.
Butt plugs of various sizes and materials can be added to the tail in place of the loop. Detachable plugs are stainless steel, one size generally but depends on the shape you choose. You will be contacted to confirm available shapes to choose from within 48 hours of deposit.
Color of these plugs cannot always be guaranteed, but you can email firstname.lastname@example.org if you have a preference in color. It will usually match the tail when possible.