Pair of CONTACT POI featuring 80mm STAGE BALL weight 150 gr. CONTACT POI represents the latest innovation in poi swinging, being perfect for isolations, throws and body rolling. The PX3 knob used on our STANDARD version is a good grippy counterweight on throws. The string is 6mm diameter and 60 cm long. To adjust the lenght of the string just pull it out off the knob, tie a simple knot and cut the excess.