Hefty 20-Count 45 gallon heavy-duty black trash bags are extra large and ideal for clean up and contractor use. They are made of 2 mil thick plastic and have a twist tie closure. Strong and durable enough for your toughest clean-up projects. Whether you're cleaning out your garage or basement or tackling a home improvement project or working on the job at a construction site you can trust our contractor bags to get the job done.