Set includes the following replacement parts for use with the SNS:

• 1 - small tubing with attached red valve
• 1 - medium tubing with attached white valve
• 1 - large tubing with attached translucent valve
• 1 - valve holder

Please refer to the SNS instruction manual for replacement tubing and valve set use. You can access the SNS instruction manual here - just look for "Breastmilk Storage & Feeding," then "Specialty Feeding," then "Supplemental Nursing System™ (SNS™)." Medela:   #101034748