Strong, stable support for laboratory equipment. The jack has a screw operated scissor - action mechanism. Crank the adjustable knob to raise and lower your laboratory item on the sturdy plate. The jack provides stable support throughout testing and holds a maximum capacity of 25kg. The platform can be vertically adjusted from a closed position of 6.3cm to a max height of 30cm. Plate size: 200 x 200mm. Closed height: 60mm. Max height: 300mm. Max load: 25kg. Platform minimum height is 6cm with maximum height of 30cm when fully extended. Made from durable powder coated steel.