Hardie 9mm Aluminium Horizontal Express Jointer – 306110 A 3000mm long horizontal flashing that can be used to replace “h” flashing. It creates an attractive 6mm horizontal shadow line. To assist with installation, it features an alignment tab for the top panels. Like the “h” jointer it has a groove to conceal the top edge of the bottom panels. Note, 9mm Axon Cladding does not fit the groove.