WINMAU's Tamper 90% delivers unsurpassed grip control with popular parallel profile. The Onyx Coated version completes the iconic range. In short, a wonderful set for beginners. This dart set comes in 4 weights; 20-22-24-26 grams. 20G = Barrel Length: 50.80mm, Barrel Width 6.10mm. 22G = Barrel Length: 50.80mm, Barrel Width 6.40mm. 24G = Barrel Length: 50.80mm, Barrel Width 6.80mm. 26G = Barrel Length: 50.80mm, Barrel Width 6.80mm.