Comparison : Item # AL150M, 1 1/2 Inch (in) Size Aluminum Shank Male NPSH Threads Coupling
Item # AL200M, 2 Inch (in) Size Aluminum Shank Male NPSH Threads Coupling
Item # AL250M, 2 1/2 Inch (in) Size Aluminum Shank Male NPSH Threads Coupling
Item # AL300M, 3 Inch (in) Size Aluminum Shank Male NPSH Threads Coupling
Item # AL400M, 4 Inch (in) Size Aluminum Shank Male NPSH Threads Coupling