This is the OmniSwivel Gas Switch Block Version 2Features: 2ea 9/16"-18(adapters) Male Inlets 1ea 3/8"-24 Female outlet Dimensions: L= 4.25" x W= 1.35" x H= 2.25" Approximate Shipping Weight = 1.0lb 6oz. Now One GSB can be converted from R to L. Solid brass construction for maximum durability. Oxygen Compatible Materials and O-Rings. Inlet adapters can be removed to expose 1/2"-20 female ports. Allowing for flexibility of hose attachments.