K12 Type : K12 Product Name : Polring Type K12 Physical Characteristics 8x6 表格 Type Demensions mm Weight(PP) (kg/m^3) Surface Area Surface Area (m^2/m^3) Weight (g/PC) Free Volume % (Pcs/m^3) Number 1/2" 12.7*12.7 170 415 0.43 94.8 410,000 5 /8" 15*15 163.8 360 0.7 83 234,000 1" 25*25 153 210 3 90 51,000 1.5" 38*38 90 129 6 90 15,000 2" 50*50 78 102 12 91 6,500 3" 75*75 - 90 - 91 2,000 3.5" 89*89 66 86 55 92 1,200 ※Under conditions of “Random dumping”. for Plastic material.