A 30mm deep tray, loaded with 40 yellow winders that slot perfectly in place between foam runners to prevent any rattling and damage.; These winders are 190mm long and 13mm wide, ideal for small and slim floats. The stack system is interchangeable with all the Rive winder trays; 30mm deep tray; 40 yellow winders; Foam runners to prevent any rattling and damage; Ideal for small and slim floats; Interchangeable with all the Rive winder trays