This is a heavy duty stand for bass trombone made in Germany by K&M. It's all steel with a wood cone on top to support the instrument. Many tenor trombones will fit too. Larger trombones like an F contrabass should fit fine, but the limited diameter of the base matched with the height of that instrument might lead me toward a stand with a wider base. Otherwise a few sand bags on the legs should reduce your worry. The Miraphone BBb contrabass should also fit, or choose a contrabass specific stand for either instrument.
The K&M stand controls allow you to adjust the center shaft height and the pedestal height. All small parts are replaceable; most are in stock. Leg pivots can be tightened. This is a beefy, tough stand that will last your entire career. I kept one of these in my gig accessory bag back in the day, but I prefer this stand for use in the studio where it stays put. It's weighty and requires several different adjustments to fold it. The K&M 14990 stand is a bit lighter and quicker to pack up, though it doesn't have the mass and studio style that this bass trombone stand offers.