Tribulus terrestris is the #1 selling testosterone booster, and the best example of a supplement that increases libido, but has no effect on testosterone.
Ab belts may cause muscle contractions if used properly. But the belt alone cannot produce six-pack abs. The real challenge to ab definition is the layer of fat that lies right under the skin, hiding muscle tone.
Abrasive belt converters buy in bulk rolls and seam per order (wide belts, stroke sanding belts) unless it is a fast moving product (3x21, 3x24, 4x24 portable belts). If we made a belt today, as a previous person stated you would not be able to use it as the glue needs 24 hours curing time (we prefer 36).