Size
262 Cubic cm (16 Cubic Inches)
Designed to hold all the essentials inflator, tube & small tools, without extra bulk.  
 
Discription: 
The Uno Black Under the seat bag is small, only enough space for a road inner tube plus gas and maybe a couple of Allen wrenches.  It also fits under the saddle nicely when cinched tight.  It rides horizontally while many other bags hang vertically.  This creates a nice tight and compact way to take your essential bike supplies along with you on any ride or race.