... bulb, quartz labware, quartz crucible, crucible, crystal powder, silicon powder, fused quartz,silica powder,high purity silica powder,quartz sand Tolerance Dimensional Tolerance Diameter Range Range ... .00mm ± 1.25% ± 8% 10% 1.5% 2.5mm 15.00-20.00mm ± 1.25% ± 10% 15% 1.5% 2.5mm 20.00-25.00mm ± 1.25 ... % ± 10% 15% 1.5% 2.5mm ...