Speed Sleeve Round Dowel Sleeves minimise vertical movement and reduce damage at joints. Speed Sleeves are easy to install and eliminate the need for greased bars and drilling foam boards. Speed sleeves are suitable for galvanized dowels and are not reusable. Available for 16 and 20 mm diameter dowels and standard lengths of 240 and 310 mm to suit 400 and 600 mm long dowels. Nailing plates available for fixing to forms sold separately.