Praveni is a new company stethoscope.com has started to distribute. Founded by an ex 3M employee that was involved in marketing the 3M Littmann stethoscopes; Todd developed what many customers have been asking for; cleaning products for stethoscopes. We have tested these products and confirm they are great. The tubing restorer cleans and helps soften older tubing not to mention removes some of the microbes just festering on the stethoscope. The metal restorer is a great way to bring back that metal shine and a drop of the lubricating oil keeps the double sided stethoscopes working great.