Kink Tweak Nipple Sucker Set Black. Tweak nipple suckers, another unique design from the Kink by Doc Johnson collection, create powerful natural suction for authentic sensations and engorgement that traditional clips can not provide. With a simple squeeze, the Tweak set fits perfectly against the skin and creates a strong seal for hands free fun, just attach to each nipple and watch them swell through the visually stimulating sheer black material. Specifications: color Black. UPC number 782421059163. Total length 1.75 inches, width, diameter 1 inch, circumference 4 inches. Material Thermoplastic Elastomers TPE. BDSM Experts. Gear you can trust. Experiment with the scene not your gear. Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high quality authentic fetish items suitable for long term practitioners and new initiates alike.