Lifting Straps is a single or two-people lifting device that allows carrying heavy and bulky objectsmore convenient. This encourages proper body mechanics and leverage to makelifting objects safer and easier. Move boxes, mulch, soil, plants, mattresses, furniture, firewood, storage bins plus so much more! It can adjust from 3 feet to up to 6 feet long (handle to handle) and support loads up to 600 pounds. As long as the a/c unit is not larger than the 6 foot and/or weighing more than 600 pounds, it will do the job.