Comparison : Item # M20S158NFSSVT, SS 316L Direct Mount 2 Way Manifold, 1/2” Female NPT Thread
Item # M20S156NFSSVT, SS 316L Direct Mount 2 Way Manifold, 3/8” Female NPT Thread
Item # M20S154NFSSVT, SS 316L Direct Mount 2 Way Manifold, 1/4” Female NPT Thread
Item # M20S158RFSSVT, SS 316L Direct Mount 2 Way Manifold, 1/2” Female BSPP Thread
Item # M20S156RFSSVT, SS 316L Direct Mount 2 Way Manifold, 3/8” Female BSPP Thread