250µL Glass Big Mouth Conical Limited Volume Insert, 6x29mm, Precision-Formed Mandrel Interior, w/Bottom Spring, 100/pk. Limited Volume Inserts - Glass Syringes TC-60 D, 0.1ml Micro-Insert, 29 x 5.7mm, Clear Glass, 1st Hydrol Class, Mandrel Point with assembled Plastic Spring,Fill Vol. 0.20, 1000nos