is a trade name for a class of chemicals (known as Chlorofluorocarbons or CFC's) used as a refrigerant in air conditioning systems. Freon is a gas at room temperature and a liquid when cooled or compressed. Freon gas is colorless, non-flammable and relatively odorless. Some Freons have an ether-like odor.
How should I take my forearm circumference measurement? In order to take your forearm circumference measurement, you should tense your arm muscle and measure around the thickest part of your forearm, as pictured.
Stand side-by-side with your partner, facing the same direction. Each of you holds one handle of one tube in your outside arm. Your outside elbow, bent at 90 degrees, is anchored at your waist. Keeping your upper arm at your side, slowly rotate your forearm away from your body.