This is an extra T-slot plate for the Blichmann Top Tier Brew Stand system. These T-slots are metal bars with three holes which are not only used in constructing the base of the stand, but also for mounting extra shelving units and burners to the stand. If you are in need of extra T-slot plates, Great Fermentations has you covered! Durable and reliable, these T-slots will help you do what you want with your Top Tier!