General description These foam cup inserts are designed to fit various cup sizes, providing stability and preventing slipping when used with a 1/2 inch PVC pipe. The set includes 24 pieces in 4 different sizes, ensuring compatibility with a range of cups from 10 oz to 40 oz. Technical specifications Sizes: 2.95 inches (7.5 cm), 3.15 inches (8 cm), 3.54 inches (9 cm), and 3.94 inches (10 cm) Material: High-quality memory foam Diameter of central foam hole: 0.75 inch (1.9 cm) Compatible PVC pipe diameter: 0.84 inch (about 1.3 cm) Measurement allowed error: +/- 1-3 cm Usage Grip the cup from the inside to maintain stable rotation Adjust the position of the cup easily within the foam insert Ensure the foam is slightly larger than the cup opening for optimal fit Other information Color: Black and Pink Package Contents: 24 x Cup Turner Foam Bonus Tip: Allow the foam to rest after unpacking to recover its shape Note: Light reflection and different displays may cause slight color variations