These Simple Build-a-ball Connectors Make The Popular Option Of Building Your Own Fruit Or Vegetable Cage Exceptionally Quick And Easy, Giving Fruit And Vegetable Gardeners The Freedom To Invent A Frame Which Suits Their Needs Perfectly. supplied In Packs Of 12, The Build A Balls Can Be Used With Aluminium Tubing Or Bamboo Canes To Construct A Simple Cage To Protect Vegetables And Strawberries. Quick To Erect And Dismantle The Build A Balls Have 6 Holes, One Designed For 16mm Aluminium Tubing And The Rest For 12.7mm Aluminium Tubing.we Recommend Using Aluminium Tubing With The Build A Balls To Create A More Sturdy Structure, But The Build A Balls Cane Can Also Be Used With Bamboo Canes. build-a-balls Used For Connecting Together Aluminium Tubing Uprights And Top Rodsmulti-purpose Connector Balls Have 6 Holesone Hole For 16mm Diameter Upright Tubes And Five For 12.7mm Diameter Top Rodssupplied In Packs Of 12tubing Fits Approx 1cm Into Ballcan Be Used With Bamboo Canes