Helium tank cylinders are typically made of aluminum. Cylinders made with aluminum are around 40 percent lighter than steel-manufactured tanks. Westwinds is a familiar brand of helium cylinders and weighs about 14 to 40 LBS.
|Westwinds Aluminum Cylinders||Weight|
|27 Cubic Foot Tank||14 LBS|
|55 Cubic Foot Tank||26 LBS|
|125 Cubic Foot Tank||40 LBS|