Ouch Hollow Curved Strap On Black unisex O/S. The Hollow Curved strap-on is the perfect hollow strap on for men and women. The strap on, attached to a leather surface, is made of PVC. This comfortable, elastic band can easily be adjusted to virtually any size. The length of the dildo is approximately 7.87 inches. The hollow space of the dildo has a diameter of 35 mm. You no longer have a reason to be bored! Specifications: dildo length 7.87 inches, circumference 4.33 inches. Materials Leather, PVC. One size fits most. Elastic adjustable straps