Ball head  type_Projectors The Nikon TC-20E II is

The Nikon TC-20E II is an autofocus teleconverter designed for select Nikon AF-S telephoto lenses (here's Nikon's compatibility list)

They may have some minor cosmetic scuffing or wear

but no haze or fungus- and is among the best of its kind

Ample room for movements with 4x5" and can cover 5x7" when stopped down

and while they’re worth noting

Ball head &nbsptype_Projectors The Nikon TC-20E II isThis is a mid sized ball head (about 12cm tall and 5cm across at the base) that should work well on most standard or travel tripods. It's well made of metal (except for the lock handle) and should support most normal sized cameras. 3 8" thread (with a 1 4" adapter) thread in the base for tripod mounting, reversible 1 4" 3 8" thread up to for your camera. Light cosmetic wear.