- Please fix the quantity error in (MQC411) Quartz Capillary Tubes (Outer Square Inner Round), O.D.: 2x2mm, I.D.: 0.25mm, Length: 100mm, (MQC401) Quartz Capillary Tubes (Outer Square Inner Round), O.D.: 2.2×2.2mm, I.D.: 1.6mm, Length: 50mm, (MQC370) Quartz Capillary Tubes (Square), Outer Dim.: 1.4×1.4mm, Inner Dim.: 1.1×1.1mm, Length: 25mm products