The 12.7mm/16mm Converter Tubing (pack Of 8) Is Designed To Allow Our Extensive Range Of 12.7mm Diameter Aluminium Tubing To Be Used With The 2012 Rhs Chelsea Flower Show New Garden Product Of The Year Award-winning Harrod Slot & Lock Connectors.the Clear Plastic Tubing Converters Simply Fit Over The End Of The 12.7mm Tube, Allowing It To Be Tightened Into Place By The Connector Screws & Are Supplied In Packs Of Eight. The 12.7mm/16mm Converter Tubing Is Ideal If You Wish To Replace Build-a-ball Or Other Connectors On An Existing Vegetable Cage Or Structure.12.7mm/16mm Converter Tubing Used To Allow 12.7mm Aluminium Tubing To Be Used With Slot & Lock Connectorssupplied In Packs Of 8formed From Clear Plastic & Practically Invisiblelength 40mm