100 ul clear tapered-bottom insert, mandrel (formed) point, allows use of microliter-size samples. Insert made of type 1 borosilicate glass, 5x31 mm. Fits 1.8 mL standard-mouth crimp crimp or screw-top vials. Packaged: 4 in. x 6 in. Plastic bag; Weight: 53.9 g.