We have been providing innovative solutions for elastomeric closures since 1908. We are based in Switzerland and a company of the Sumitomo Rubber Group. As a trusted partner to industry leading pharmaceutical and medical device organizations around the world, Lonstroff is committed to provide world class product and customer service for even the most challenging packaging solutions. We drive quality into every facet of our organization and are committed to help to improve the lives of patients all around the world. Motivated every day we build up your product fundament. WE. THE TEAM. OUR COLLEAGUES. WE ARE LONSTROFF.