Nitromousse 5150-Plushie-18"The Nitro 5150 insert is designed to work with the Tubliss system to provide even more protection and substantially increase stability allowing you to run extremely low (or zero) PSI for insane traction gains. Features: The channeled crown allows for use with sealant and provides for a much more progressive feel. Available in Platinum and Plushie compounds, includes NitroLube for added durability.