I have one used and one new bracket. These are made from CNC machined T-6061 aircraft aluminum. They are made to hold the typical 6-pack design of the Optima batteries. They probably won't work with anything else, so I can't be responsible if you want to try another battery and they don't work.
At their thickest point, the material is 1/2" thick. These things are extremely sturdy. They worked VERY well for us. The only reason we don't need them any more is that we switched to the Kinetik in our car.
SOLD! New: $125 shipped - In new condition, still in the original foam wrapping.
SOLD! Used: $50 shipped - Used for a few years, has the usual scuffs from being under the hood of a car, but nothing major.
If you want insurance, you must specify that and be willing to pay for it. UPS includes $100 of coverage. I'll ship UPS ground, anything more and it's on you.
I prefer Check or Money Order, or payment via Revolution Money Exchange, PayPal as a last resort...I hate those guys...
Top of the bracket:
Bracket without the battery (the sides bolt in from the bottom):
Upclose picture of the hardware that comes with both brackets:
Please note: This bracket DOES NOT include the black mount on the bottom. That's a custom piece that we made for our car. It's still in our car...
Any questions or picture requests, feel free to ask.
You can find other detailed pictures of the used bracket as it was going in the car a few years ago here:
http://www.mj-garage.com/Gallery2/v/Car+Audio/GTi/2007+Build/Old+Battery/?g2_page=4