Uni-Loc 60BHThe Uni Loc 60BH is a large, all metal ball head designed to hold, I'm guessing, pretty much anything: it has a 6cm ball, a 7. 5cm platform, and it's made (in the UK!) of solid, well finished metal. The downside: it weighs almost a kilo on its own. But if you have a camera that needs a head this big, that's more or less a rounding error. Standard 3 8" thread for leg mounting, 1 4" thread for camera. In excellent condition, with only minimal wear.