Kit Includes: Tube (binaurals) with soft ear tips. Four spare soft ear tips, Rim and Diaphragm set, One ID tag. This tube set is a perfect Compatible replacement. One year warranty. 3M(r), Littmann(r) Master Cardiology(r) and Cardiology III(r) are registered trademarks of 3M(r) Corp. There is no affiliation, sponsorship, or other connection between 3M(r) and CardioTubes.