Flowell Universal Type Orifice Plates are designed to be used with ring joint plate holders. Standard industry sizing also allows our plates to be used with any of the dual or single chambered orifice fittings on the market. Flowell stocks 2″ through 12″ sizes in 1/8″ and 1/4″ thicknesses in both 304 and 316SS. Other sizes and materials are available on request. When ordering, please specify the following: Size, Thickness, Bore Diameter and Material.