is 2.000x 1.625x .1875 ok for upper and lower control arms. the shit was free:flipoff2: and i got 10 sticks at 70" each. dont know anything about tubing.:shaking:

Meh....3/16 is prolly not gonna get you far. Its prolly ok for the uppers, though a little bulky. Lowers will definatly need to be bigger material. Id say 2", .375 wall minimum for lowers depending on your wheelin style.

Heres a couple articles that can help you learn about materials.

http://pirate4x4.com/tech/billavista/Links/

http://pirate4x4.com/tech/billavista/PR-BV60/index1a.html