Aluminum Wagon Walls Removable wagon walls are available as an optional accessory for all Alumacart wagon styles. Walls stand 8.5 tall, fabricated using 4 x 1 aluminum channel for horizontal walls and 1 x 1/8 square aluminum tubing for wall uprights. Walls slide into ten aluminum receivers that are bolted to the bed of the wagons with all stainless steel hardware. Can be removed at any time, each side can be independently removed also. DESCRIPTION All Aluminum Wagon Walls Removable wagon walls are an optional accessory for all Alumacart wagon styles.The walls stand 8.5 tall, fabricated using 4 x 1 aluminum channels for horizontal walls and 1 x 1/8 square aluminum tubing for wall uprights.Walls slide into ten aluminum receivers bolted to the wagons bed with all stainless steel hardware.It can be removed at any time, and each side can be independently removed also.