quartz plate properties average value of impurity FLH211/311 AlFeCaMgTiCuMnKNaLiCoNiB21.320.941.880.290.540.050.050.402.061.66<0.07<0.070.16 length :L1width: L2 unit :mm specificationtolerance10≤L1<3010≤L2<30+0.0 -0.330≤L1<10030≤L2<100+0.0 -0.5100≤L1<200100≤L2<200+0.0 -0.7200≤L1≤350200≤L2≤350+0.0 -1.0 WTspecificationtolerance 1≤δ<3±0.2 3≤δ<8±0.3 8≤δ<12±0.5 12≤δ<20±0.6 optical film:Spectral transmission >90% in the visible range