... protein to avoid possible allergy. (2)Feature: Rubber cover is used on blood collection needle, which can ... bounce back to cover the needle tip after puncture stopper of blood collection tube, and ... -2008. (4)Size: 19mm, 20.5mm, 21mm, 24mm (5)Color: Gray. (6)Package: Medical polybags inside ... ODM, We are the leading manufacturer in Medical Rubber Field with 20 years’ experience from 1992, ...