TC-50 A, 0.2ml Micro-Insert, 31 x 5mm, Clear Glass,1st Hydrol Class, 1st Hydrol Class, Mandrel Point with assembled Plastic Spring,Fill Vol. SAMPLE PREPARATION Insert Vial - Mc-Latra Micro-Insert 29*4.8mm, 100ul, clear, bevelled bottom with assembled plastic spring, for 8-425 screw top glass vial.