Back to back clamp mounts for clamping 1" OD tube or pipe parallel to 1.5" OD tube or pipe.  We use this for mounting gas rails to the lower 1.5" OD members of our Brewstand.  Includes a silicone bushing to allow for clamping of 1/2" NPT iron pipe.  Made of 304SS, welded in house.  Sold individually, you need at least two to hang a gas manifold, more if it is a heavy or long manifold.