2ml Clear Screw Top Vial with Write-on Spot & Fill Lines, Small Opening, V823. Small opening, screw-thread with write-on spot, fill lines, 11.6 x 32mm, USP 1 expansion 33, 100pk. Product Code: V823. Enquire Now. 1.5ml Amber Screw Top Vial, 8mm Wide Opening, no write-on spot. V835.