I've tried many 20-410 treatment pumps--and this one is the best!
"These are wonderful! 5 of our serums use this treatment pumps. We tried many from different suppliers. For one serum batch we used a treatment pump from a different supplier--and we had to send replacements pumps for malfunctioning pumps to customers 1 out of 5 times!! It cost us so much in time and shipping to mail replacements. These treatment pumps from WSP are worth every penny. And they make the product look top notch too!"

