These professional height-measuring rods are designed to meet the medical-grade accuracy professionals depend on. Their high-quality aluminum construction, to its durable ABS plastic, these easy-to-use and simple height-measuring rods are built for long use. Its retractable design and folding headpiece make it compact when not in use. Product Description HM230M is an height measuring rod for mounting on the wall. Measuring range 10~230cm Division 1mm Power manual