Quantity: one piece Dimensions: 150 x 150mm. Extendable lifting height range of 75-260mm and load capacity of up to 10kg Available in three sizes, our scissor lab jacks can support a variety of objects or lift them making them ideal for most everyday lab work. Made of high quality stainless steel to ensure its durable, corrosion resistant and sturdy construction; all screws are coated with anti-rust lubricant, long-term transportation may cause loosening; please check and tighten the screws before use Raise the jack to an appropriate height before placing heavy objects. If you put the weight on first, it will be difficult to lift Clean after each use and store in a cool, dry place. StonyLab Warranty: 1 month hassle-free returns and 1 year limited warranty (excluding free replacement and shipping)