You're putting together your own Back-Plate and Harness System and want to use a Crotch Strap to prevent Cylinder Ride-Up". Scubapro's X-Tek Crotch Strap will fit Back-Plate's from Scubapro and other Back-Plate's which are slotted for 2" (5.1 cm) Nylon Webbing. Crotch Strap comes complete with 2 Corrosion Resistant Stainless Steel D-Rings for attachment of Accessories, Crotch Strap is Adjustable for a Custom Fit. Webbing is easy to install and has Durable Box Stitched Loop for Added Strength on the Waist Strap Attachment End. Crotch Strap is also equipped with Corrosion Resistant Stainless Steel Bar Slides for Strap Retention and Adjustability.