Goodhead Helping Head Pro BJ Stroker Frost from Doc Johnson Novelties Doc Johnson's new GoodHead Helping Head Pro is a 3 inches mini stroker specifically designed for handheld use to heighten the sensations and pleasure during fellatio. Soft on the outside, and with stimulating massage beads on the inside, this uniquely-shaped stretchy stroker is made from our clear ultra realistic Ultraskyn for the ultimate feel. Turn GoodHead into great head tonight! Specifications: total length 3 inches. Width, diameter 1.75 inches. Circumference 5.25 inches. Package weight 0.2 pound. Material Thermoplastic Elastomers TPE.