Brand new 300ul micro volume insert suit for thread vials *CRX2000-5003 Micro-Insert 31*6mm, 400ul, clear class, flat bottom, for 2ml 9-425 screw top glass vial, 100/pk * Compatible with Chrominex Vials only 8-425 Screw Top Glass Vial, narrow opening, 2ml Vial Volume 2ml, Vial Size 12x33mm, 8mm diameter Waters 300ul micro insert with high quality-HPLC Vial Inserts 29*5.7mm Low Volume Insert