The original ATOM BIKES HARDASS seat post. 
7/8" diameter for old school BMX (22.2mm)
Constructed of solid extruded 6061-T6 aircraft grade precision aluminum rod. 
Tired of bending your seat post? Have no worries, these are guaranteed for life. 
Hand polished to a high luster. 
All items shipped Free.
Weighs approximately 1 ounce per inch. 
Available in four standard lengths: 10", 12", 14", and 16". 
Customs lengths and diameters available upon request.
Perfect for grownups who still ride their vintage scoot. 
Ride with confidence and style. 

The one shown here on the mongoose is 16" long and is inserted 3 1/2" into the frame.