Tenga Premium Rolling Head Cup is a masturbator with a unique shape. It has a movable spiral that can be bent freely. The Premium series is characterized by an even better quality of workmanship and a more complicated interior full of insets that provide a more intense experience. The pressure inside can be adjusted with the opening on the top of the product. A network of stimulating tabs inside the sleeve. Intense sensations. Internal pressure control. Easy to maintain hygiene. Flexible spiral . Materials: Insert Sleeve: Thermoplastic Elastomer (TPE) Casing: PE Size (D à W à H inches): 2.72 à 2.72 à 6.10 Insertion Length (inches): 5.80 Insertion Width (inches): 1.80