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 25cm.Plate size: 150 x 130mmClosed height: 60mmMax height: 250mmMax load: 25kgPlatform minimum height is 6cm with maximum height of 25cm when fully extendedMade from durable powder coated steel