This is a classic, no-nonsense retort stand base for your lab or workshop. It's the heavy-duty 'H' shape, made from thick cast iron, so it's seriously sturdy and won't tip over easily (weighs about 3 kg). The base measures 20 cm by 20 cm. It has a threaded hole in the center with a thumb screw to securely clamp a vertical rod. It's designed to accept standard laboratory rods with a diameter of 11 to 12 mm (the rod is NOT included, you buy that separately). This is the foundation for all kinds of setups: holding clamps, ring stands, thermometers, etc. Built to last and handle real equipment. Perfect for chemistry labs, physics demonstrations, or any DIY project where you need a solid, adjustable holding platform.