Feature Closed grained & uniform texture Very hard,high wear resistance&extreme rigidity Outstanding dmensional stability Least affected by temperature changes Non-corrosive & easy maintenance Least subected to internal stresses Suction-free & non-magnetic Lifing facility procided for standard sizes Top surface lapped smooth&flat Inspected by electronic level ,precision level&auto collimator traceable to NABL Dust cover provided for top surface Physical properties Specific Gravity: 2970-3070kg/m3 Comprissive Strength: 245-254N/ mm2 Elastic Modulus: 1.27-1.47N/ mm2 Linear Expansion Coefficient 4.61*10-6/°C Water Absorption: <0.13% Shore Hardness: Hs70 upwards of Type L*H*S(mm) Weight (kg) Grade 000 Precision (um) Grade 00 Precision (um) Grade 0 Precision (um) Grade 1 Precision (um) 300*300*50 19 1.5 3 6 12 400*300*70 25 1.5 3 6 12 400*400*70 48 2 3.5 6.5 13 630*400*100 76 2 3.5 7 14 630*630*100 155 2 4 8 16 800*500*130 156 2 4 8 16 1000*630*130 284 2.5 4.5 9 18 1000*750*150 338 2.5 5 9 18 1000*1000*150 450 2.5 5 10 20 1600*1000*200 963 3 6 12 24 2000*1000*200 1200 3.5 6.5 13 26 1600*1600*300 2312 3.5 6.5 13 26 2000*1600*300 2890 3.5 7 14 28 2500*1600*300 3612 4 8 16 32 3000*3000*500 9030 4.5 9 18 36 4000*2000*500 12040 4.5 11 22 44 6000*2000*700 25284 5.5 15 30 60