Downtown Pet Supply Citronella Refill Canisters to Control Dog Barking, No Bark, Anti Bark Collar - 3 oz - One Pack Works with: Downtown Pet Supply, Gentle Spray, Spray Commander, Spray Barrier and Virtual Fence spray products. 1 Pack, 3.0 ounces, Approximately 300+ sprays Safe and Effective for humans and animals, Ozone friendly Satisfaction Guaranteed Brand: Downtown Pet Supply