网页Short-style shell vials are ideal for storing dry products. Plain top design Lab pack quantities Manufactured from 51 expansion borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class B requirements Shell vial of N-51A borosilicate glass Plain top Open bottom TITESEAL® closure (not attached) 0.5 dram vial measures 12 mm o.d. x 35 mm