300uL Micro-Insert, 31*6mm . Clear, Flat Bottom, Suits for 10-425 Vials. 250uL . Conical Micro-Insert, 31*5.7mm, Suits for 10-425 Vials. 250uL . Micro-Insert with Mandrel Interior, & Polymer Feet, 29*5.7mm, Suits for 10-425 Vials. 250uL . Conical Micro-Insert, 31*5.7mm, Suits for 10-425 Vials. 250uL . Micro-Insert with Mandrel Interior