What is the difference between ZB4 and ZB5 lines?
Harmony Push Buttons
The ZB4 is a metal line and ZB5 is a plastic line. They use the same contact blocks and light modules, but they use different mounting collars. ZB4BZ009 is for the metal line and is a metal collar with a single screw, and the ZB5AZ009 is a plastic collar that snaps onto the operators. They are not interchangeable.