Each refill holds 3.1 ounces, which is approximately 300 + sprays. Use these refills with the following brands; Downtown Pet Supply, Gentle Spray, Spray Commander, Spray Barrier and Virtual Fence spray products. It contains a citronella mixture that is 100% safe for people, animals and the environment. Citronella is an essential oil that derives from lemon grass. The propellant is the ozone friendly. Satisfaction Guaranteed. BRAND: Downtown Pet Supply