Inserts, 150ul/250ul/300ul - WAJR Products, China Manufacturer. Insert: IP150 150uL Insert with mandrel interior and polymer feet, 29*5mm; suits for ND8 Vials 16.1USD IP250 250uL Insert with mandrel interior and polymer feet, 29*5.7mm; suits for ND9 Vials 16.1USD I250 250uL Micro-Insert,31*5mm,clear glass,flat bottom; suits for ND8 Vials 3.51USD I300 300uL Micro-Insert,31*6mm,clear glass,flat