Vac-u-Lock Accessories - Our No.1 range of Strap-ons, from Doc Johnson, is complimented with a variety of interchangeable parts. One of the unique feature features of the Vac-u-Lock ststem is the great choice of interchangeable Dildo, Dongs, Harnesses & Plug.  With endless choice, you can keep adding to your strap-on pleasure with something different.  Vac u Lock Strap-ons are suitable up to waist 44".  The Vac-u-Lock Strapons are used by some of the World's best known Porn Stars and for very good reason.