These slip on forklift extensions are designed to slip over your existing forks to extend the reach of the machine. Approximately 7' long and 5.5" wide, see exact measurements in the photos. Weight capacity will vary based on how long the forks underneath are and what their rated capacity is. It is recommended to have the forks underneath be about 3/4 the length of the extensions and that should give a weight capacity of 4000 lbs. $250 OBO