Semi-flexible silicone attachment for DOXY Number 3. Turn your Number 3 Massager into a super powerful male masturbator! Enjoy sizzling sensations from the dual density silicone sleeve with tiny ticklers. Simply unscrew the massager head and replace with the Nexus masturbator sleeve to enjoy new heights of stimulation. Made from firm high quality dual density silicone. Internal length 11.4 cm. Diameter up to 4 cm.