Don't use them - they are useless!!!
Had to contact my credit card company and get my money returned.
Blimey! how did you screw into your tank for those brackets
Good job i never ordered mine from there but its good to get the feedback ,
The brackets come as standard on a brodex system well fitted haha .
The tank is about 10mm thick so plenty to screw into and i found that out after i drilled the hole for the immersion i couldn't get the mechanical flange on as the thread did not come through the tank . I got it sorted eventually