●Dimension: 4 inch x 4 inch. Expandable Lift Height Range from 45mm to 150mm and the maximum supported weight is 5KG ●Our scissor style lab jack is available in 5 sizes to support a wide variety of items or elevate objects, an ideal choice to satisfy most daily lab works; Stainless Steel Top and Bottom Plate is NOT Magnetic, Galvanized Iron Stand with Magnetic Property ●Made of high quality stainless steel, ensuring it durable, corrosion resistant and sturdy constructed; all screws are coated with anti-rust lubricating oil, which may cause loosening during long-term transportation; please check and tighten screws before use ●Please lift the jack to appropriate height before placing heavy objects; Placing heavy object first will make it hard to lift ●Please keep it clean and store in a cool, dry place after each use; StonyLab Warranty: 1 month hassle free return and 1-year limited warranty (free replacement and shipping fee not included)