- Please fix the quantity error in (MQC410) Quartz Capillary Tubes (Outer Square Inner Round), O.D.: 2x2mm, I.D.: 0.25mm, Length: 50mm, (MQP321) Quartz Disc, Round, Diameter: φ20mm, Thick: 1.5mm, Type 1 Quartz, 190-2500nm, (MQC367) Quartz Capillary Tubes (Square), Outer Dim.: 0.9×0.9mm, Inner Dim.: 0.7×0.7mm, Length: 25mm products