Stenner Black # 1 Tube Assembly (Two Pack).
Has a maximum feed rate of 0.42 gph, vs. the # 2 tube ( yellow ) which is rated at 1.42 gph.
# 2 Yellow is more commonly used, so do not order the # 1 ( black ) unless you are 100% sure that is the tube you need for your application.
Once the package is opened, we can not accept a return of the item.
Installation Video on Stenner.comTube Installation Video Link