The Premier Michael Smith 90% from UNICORN is a dart set with barrels of 90% Tungsten and is the ultimate dart set from the English dart player Michael Smith and this in an ultimate PREMIER package. The Premier 90% Michael Smith includes a tattoo hallmark with bullyboy's signature. This personalized dart set from Michael Smith comes in 5 weights; 21-22-23-24-25 grams. 21G = Barrel Length: 49.60mm, Barrel Width 6.20mm. 22G = Barrel Length: 49.60mm, Barrel Width 6.30mm. 23G = Barrel Length: 49.60mm, Barrel Width 6.40mm. 24G = Barrel Length: 49.60mm, Barrel Width 6.60mm. 25G = Barrel Length: 49.60mm, Barrel Width 6.70mm.