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, which is known to glow both strongly and for a long time. Berg X has been developed for the shorter throws where you must have complete control over where your disc lands. With the lowered top, it is a disc with very little float, and you are therefore sure that your disc will not play tricks with you when you throw it.