- Please fix the quantity error in (MQC413) Quartz Capillary Tubes (Outer Rectangular Inner Round), O.D.: 5x3mm, I.D.: 0.8mm, Length: 50mm, (MQC393) Quartz Capillary Tubes (Outer Square Inner Round), O.D.: 1.25×1.25mm, I.D.: 0.127mm, Length: 100mm, (MQC024) Quartz Capillary Tubes (Round), O.D.: 0.7mm, I.D.: 0.5mm, Length: 50mm products