Crafted from brass in a lab-style, the clerk utilizes the Hario v60 glass pour-over (included) resting on the ring to adjust to the height of your mug or decanter. The ring adjusts using the brass slider on the rod (11 inches tall) to the height you need. The base is made of beautiful American walnut finished with a simple food-safe coating. The ring can accommodate a number of other pour-over cones and bases.