X:Steel case, steel bezel, glass window, brass internal and connection, dry , with rubber hose or ABS case,snap on plastic window,brass
internal and connection,dry, with ABS air valve (Tyre pressure gauge)

Y:Steel black case, chrome plated bezel, plastic window, brass internal and connection dry

 U:ABS case, snap in plastic window, brass internal and connection, dry

 V:Flre extinguisher pressure gauge