PDX Elite Vibrating Mouth Stroker Material: Thermoplastic Elastomer (TPE) ABS Plastic Battery Info: 3 LR44 / AG13 (1.5V) (Included) Length: 6.5 in. – ( 165 mm ) Width: 2.8 in. – ( 71 mm ) Height: 2.8 in. – ( 71 mm ) Inner Diameter: 1.5 in. – ( 38 mm ) Oral Insertion Length: 5 in. – ( 127 mm )