Scubapro S-Tek Pure Harness AluminiumSCUBAPRO S Tek Pure Harness with Back Plate follows the DIR (Doing It Right) approach to BPW diving with its streamlined, minimalist design. Recessed Wing Nut Socket features S Tek Ergo Nuts that are ergonomically designed to be used with cold, wet or gloved hands, easy to tighten loosen and flush mounted to prevent suit abrasion. Recessed Wing Nut socket is also compatible with standard wing nuts. Back plate provides mounting points for trim weights,