Kastaplast’s Berg X is a modified version of the popular Berg putter, and here the disc comes in the very popular K1 Glow plastic, known for glowing both brightly and for a long time. The Berg X is developed for the shorter throws where you need complete control over where your disc lands. With its lowered top it is a disc with very little glide, so you can be sure your disc will not play tricks on you when you throw it.