Stamp color may vary. Disc colors are assorted. The D Model US is built for beginners and players with slower arm speeds. With its naturally understable flight, the disc will want to turn over and hold before coming out of it to softly glide back toward the ground. A good premium plastic is durable enough to stand the test of time and the elements while still providing excellent grip. We've hit all those marks with our DuraFlex blend that will continue to feel nice and grippy whether it's the first flight or long after the disc has slowly broken in.