Looking for a practical solution for your cup - making projects. Our 10 Piece Cup Turner Foam Tumbler Spinner is the perfect choice. It comes with 5 different sizes, with diameters ranging from 40 mm to 95 mm, offering multiple options to fit 10 oz. to 40 oz. tumblers, cups, and water bottles. The foam works seamlessly with 1/2 in. PVC pipes, with a center hole diameter of 0.78 in. that holds the pipe tightly. Its unique eight - star design is a novelty on the market, with elastic foam that fills different sized cups and keeps them stable. Made of high - density EVA foam, it's non - scratchy, durable, and reusable. Simply attach it to the PVC pipe of your cup turner machine, and you can DIY your own tumbler cups without worrying about slippage. Whether you're packaging tumblers, working on glass crafts, or other DIY projects, this foam insert is a must - have for your creative endeavors. Color: Black.