Conical Micro Inserts, volume: 150ul & 250ul, size: 31*5mm(150ul), 31*5.7mm(250ul), suit for 8-425, 9mm, 10-425, 11mm vials. In order to meet the needs of micro-injection, micro-intubations of different capacities and structures can convert the sample bottle from full capacity to limited capacity in a simple step.