... : Glass Diameter Tolerance: +0.0, -0.1mm Thickness Tolerance: +/-0.05mm Glass tube(Glass Washer) We could according to you requirement design and ... make many kinds of tube products. Specifications: Material:B270, BK7, Fused silica etc glassDimension Tolerance:+0.0, -0.1mmThickness Tolerance:± 0.1mmSurface quality:60/40 ...