The Innova DX Bottom Stamp Aviar Putter is a great beginner friendly putt & approach disc that is straight. It is a beadless model, a straight flier with a predictable finish. Versatile and dependable in all conditions. It is blank on top and stamped with Aviar Putter on the bottom (altho image is an X-Caliber). Great for custom designing, a clean look or concealing the model you are throwing. The Aviar Putter is the number one putter in disc golf having won more World Championships than all other putters combined. Great for beginners and all skill levels. A must have disc golf putter for any serious competitor’s bag. The Aviar is Innova's most popular disc. 21.2 cm diameter It is made from the Aviar "small bead" mold which means it has no bead on the rim. Some of the other Aviar models are made from the Aviar "big bead" mold which means they have a bead at the bottom of the rim. Speed 2, Glide 3, Turn 0, Fade 1 – Diameter: 21.2 cm – Rim Width: 0.9 cm About DX plastic – discs are affordably priced and provide an excellent grip in all types of weather conditions. Over time, DX discs will take on new and varied flight characteristics that stem from their use. They start out more overstable, but with use will match the flight ratings. With continued use, they'll eventually become more understable than the ratings.