1.25" X .120 wall D.O.M. tube is an excellent utility tube. We use it for mounting hard points like seat frames, fuel cells, or curved or straight tube gussets. You will find lots of uses for this size. We do not use it for structural members but extensively as a reinforcement for structural tubes.
Tube is sold in 1 foot increments starting at 1 foot, the first foot is higher than every additional length to account for the time spent cutting tube. Precut tubing is shipped by UPS Ground in lengths no longer than 6ft. Call in with a commercial shipping address for full stick pricing delivered (must have room to accept a large truck and have the means of unloading!). You get the most for your money ordering multiple sticks as shipping 1 stick (~20') is not much different than shipping for multiple sticks