In order to get the most effective use out of a trigger sprayer, make sure the container and sprayer have the same neck finish. For example, a 28-410 trigger sprayer is designed for a 28-410 bottle. The numbers in the neck finish are measured in millimeters, and the threads in each design are different. If these two products don’t match, you’ll have to purchase a new trigger sprayer if the one you have is no longer suitable.Ningbo Hongpin Plastic Industry Co., Ltd. is well known supplier of Factory Direct Standard Trigger Sprayer and wholesale Factory Direct Standard Trigger Sprayer company which integrating design, manufacturing, development and production. Company custom and wholesale these products worldwide.