Backed the wrong horse? We have something that might just help:
Using Adapter D30/D28, you can now easily connect an existing steel structure built using tube systems with a diameter of 28 mm to the aluminum components of Profile Tube System D30.
Thanks to Adapter D30/D28-37, it couldn’t be easier to make the transition to a whole new dimension. Simply attach the Adapter to the tube (⌀ 28.6 mm), place a Tube Adapter D30 over it and the way is clear for extending your old structure using the innovative Line D30.