The Breha 700mm Canopy Lift Mechanism with Standard Tension Spring is a flat ?scissor? style canopy lifter which raises the roof on Pop-Tops or Campervans. Each lifter will hold up 35kg of roof, with the standard spring included. The bottom bracket measures 560mm long, and it can lift to a maximum height of 685mm. Made of a steel track on the top and bottom sections as well as two flat steel lengths that form an ?X? and pivot in the centre.