For sale is a brand new Innertube which fits the following sizes:

16x6.50-8 16x7.50-8 18x6.50-8 190-8
TR13 straight standard valve

The innertube is manufactured using high quality butyl rubber and will outlast those made of inferior materials.

ONCE THE INNER TUBE HAS BEEN OPENED AND USED YOU CANNOT RETURN THE TUBE