Green Knobby Tubes (4 pk)

4-Pack

The Green Knobby Tube  has increased sensory input (over the yellow and red chewy tubes) due to raised bumps on the shaft. The stem is 12 mm. It is also slightly harder than the yellow or red chewy tubes. All tube handles have corrugated ridges to assist with the grasp, which is especially helpful for those who are visually impaired.  To clean, wash with mild soap and water. Replace when signs of wear become visible.

NOTE: Not recommended for use with children under 9 months of age.