HFS(R) 4" x 4" 100mm Stainless Steel Lab Jack Scissor Stand Platform 3kg/6.6lbs Load Bearing 3kg/6.6lbs Constructed from Stainless Steel Easy Turn Black Knob Dimensions: 4 inches x 4 inches Max Height: 5 3/4 inches Fully Lowered: 1 5/8 inch