200uL Glas Conical Limited Volume Insert, 5x31mm, Precision-Formed Mandrel Interior, No Spring, 100p . 0,3ml clear glass micro insert for 4ml vials, 40x6mm, 15mm Certified Vials with fused-in inserts, 0.3 mL – Sigma-Aldrich. Certified Vials with fused-in inserts, 0.3 mL. The QSertVial ™ is the ultimate microsampling device.