Why choose RynoDeck Fixed Height Decking Cradles? Fixed height decking cradles from RynoDeck allow a 10mm or 20mm minimum height change of decks. By using accompanying Ryno Shims you can adjust the height in a minimum of 2mm increments, with 5mm shims available, the height of the decking cradle can be adjusted and fine-tuned to what is required. This is perfect for levelling a slightly uneven surface.Compatible with RynoDeck 10mm Fixed Height Decking Cradle and RynoDeck 20mm Fixed Height Decking Cradle, these 5mm shims allow fine adjustment of the height of a deck up to a change of 40mm. RynoDeck Fixed Height Decking Cradle Shim Specifications Shim Height: 5mm