"25mm (1""), 50mm (2"") or 100mm (4"")) height extender for StrataRise Multi-Level 1836, 2442, 3560, 4166, 60115 and 115230 support pedestals. Adjustable height can be increased by using one or more of our QuickClick, bayonet, extension pieces to achieve the required height range. Extenders can be used in multiples and size combinations to achieve the required height. Note: For high level installations it is essential to secure the structure to prevent horizontal, sideways movements."