Harken 40mm Tensioner T-Track Self-Locking, 1500mm (HC9953). 
 Track is extruded from high-grade 6061-T6 aluminum and hardcoat-anodized for a hard, long-lasting surface.
  Technical Description
     59 1/16 in
 1500 mm
  1 9/16 in
 40 mm
  60.56 oz
 1717 g
  B811
   * DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.