Comparison : Item # F1520A, 1-1/2" x 2"
Part F Adapter x Male NPT
Reducing Cam and Groove Coupling
Item # F2015A, 2" x 1-1/2"
Part F Adapter x Male NPT
Reducing Cam and Groove Coupling
Item # F2030A, 2" x 3"
Part F Adapter x Male NPT
Reducing Cam and Groove Coupling
Item # F3020A, 3" x 2"
Part F Adapter x Male NPT
Reducing Cam and Groove Coupling
Item # F3040A, 3" x 4"
Part F Adapter x Male NPT
Reducing Cam and Groove Coupling