white polypropylene hole cap, thread for 10-425, for use with 2 mL large opening vial (6.0 mm), pkg of 100 ea: Pricing: 27413: yellow polypropylene hole cap, thread for 10-425, for use with 2 mL large opening vial (6.0 mm), pkg of 100 ea: Pricing: 27053: black polypropylene cap, thread for 13-425, for use with 4 mL vial with 13-425 thread, pkg