Series Model 4000 Four valve bar stock manifolds 180° Mounting remote with 1/4" NPT drain 4050 Four valve bar stock manifolds 180° Direct mounting with 1/4" NPT drain 4100 Four valve bar stock manifolds 90° Mounting remote with 1/4" NPT drain 4150 Four valve bar stock manifolds 90° Direct mounting with 1/4" NPT drain 4200 Four valve manifolds 180° ( planar ) 4250 Four valve manifolds 180° Mounting remote with 1/4" NPT drain for differential gauges 4300 Four valve manifolds 180° Mounting remote with 1/8" G drain for differential gauges