Upper/lower mount are fabricated from .050" steel that has been Tig-welded to make connections strong and durable. T-bolt on upper mount is 1/4-20" thread for quick removal or installation. Upper and lower mounts are designed to mount to a flat plate with two 1/4" fasteners on a 2.00" bolt spread.
Brackets are sold in a pair upper/lower as shown in the pictures and are raw steel finish.
Air bottle shown in pictures is for picture purposes only. Both brackets as shown in the pictures weight one pound together.