Constructed of orlon, polyester and acryllic, same as the Cow Life-Cattle Rubs Will not rot Perfect size to suspend vertically in front of mineral feeders or in entry way of creep feeders Each bullet holds one pint of insecticide Approximately 18" long with a metal ring at the top Easy - Effective - Economical Easy to change or add insecticide to control and prevent resistant flies Control for the whole season that also prevents resistant flies PHW03 Constructed of orlon, polyester and acrylic. Will not rot. Perfect size to suspend vertically in front of mineral feeders or in entry way of creep feeders. Each bullet holds one pint of insecticide. Approximately 18" long with a metal ring at the top.Easy to change or add insecticide to control and prevent resistant flies. Control for the whole season that also prevents resistant flies.Easy - Effective - EconomicalCattle Rub Insecticide Chart:InsecticideActive IngredientsMix Rate-per Gallon #2 Diesel Oil or Mineral OilBrute Pour-On10% Permethrin1.6 ozCo-Ral6.15% Coumaphos9.75 ozPermectrin 10%10% Permethrin1.6 ozPermectrin Pour-On1% Permethrin16 oz Prozap Insectrin X10% Permethrin1.6 ozPyranha Stock Guard10% Permethrin & 10% Piperonyl Butoxide1.6 oz