This universal mount battery box for Antigravity 4 cell lithium ion batteries is machined from 6061 aluminum. Mounts anywhere you choose using the supplied 1/4"-20 flathead screws. Assembled dimensions are approximately 4-1/2" long by 1-1/2" wide and 3-1/4" tall, and including the battery (not included) weighs just about 1 pound! Made in the USA.