Turn your magic wand vibrator for external use, easily into a massager for intimate and internal use. The insert opening of the attachment is 4.3 cm to fit onto heads of all wand massage devices of any brand, with a head of 4.5 cm or bigger. The attachments are made of body safe TPR TPE material. It is soft, flexible, very easy to clean and perfect to use with water or silicone based lubricants.The wand attachment will stretch to fit most wand heads securley.