Suitable for glass dropper bottle with 18mm-415 neck finish and Boston Round Bottles with GPI 400 neck finish.

Available design: CR cap (Child Resistance dropper cap) and normal design with tamper evidence ring  for dropper bottles with 18mm-415; CR cap and normal design for Boston Round Bottles with GPI400 neck finish. 

18mm-415 neck finish: DIN 18mm screw neck finish is the most widely used standard of glass dropper bottle and designed to control the distributing dose of medicines and essential oil products, often referred to as GL18, JY18. Its typical dimension is with inner diameter 10.65mm, outer screw diameter 17.75mm and skirt diameter 20mm. 

GPI 400 neck finish: including 18mm-400, 20mm, 22mm, 24mm, 28mm.

A variety of shapes and styles can be selected as you want, the length of glass pippete varies with the inner height of the bottles.