Verve Prostate Massager Black. Powerful multiple speed vibrator that delivers intense, focused prostate stimulation through the specially angled tip. Anatomically designed with natural smooth curves that allow for comfortable insertion and full penetration. Long handle and twist base controller allows for safe and effortless operation. Please use with personal lubricant. <br /><br />Made of ABS plastic. Water resistant for shower only, phthalate-free, and latex free. Prostate probe measures 8 inches long by 1.4 inches wide. This vibrator is compatible with any lube. After use, carefully blot the shaft of the vibe with a soft cloth dipped in mild soap and water or a sex toy cleaner. Verve Prostate Massager from the Sinclair Institute. Better Relationships. Better Sex. Diameter of the head is 1.25 inches.