Hatchlift is a family owned business located in the foothills of Denver, Colorado. The company was started due to problems we personally encountered using the exterior storage areas of our RV. Hatchlift RV Door Lift Kits include all the components necessary to install hydraulic lift assists on lightweight RV doors. Hatch doors over 30" in width should have a Hatchlift Kit installed on BOTH sides of the door. Hatch doors with slam latches, order the next larger size. Hatchlift Kits are assembled in the USA.