This series was developed with an extended, metal-sheathed, borosilicate glass barrel and strengthened plunger stem which acts as a support guide for the extremely fragile, small diameter plungers. The one-piece glass barrel construction also permits complete flushing of residual sample carry-over with the plunger removed. Available with fixed needle(N) or removable needle(RN). Needles have 22° beveled point(Style 2).