The Prozap 5ft bovi-rub back Rubber is designed for effective and economical control of flies, GRUBS, lice and ticks on cattle and other livestock. Superior Insecticide charging with wicking action allows for low-stress application of pesticides on cattle and other livestock. Hang near water, mineral feeders or in alley ways to encourage use. Initially charge the bovi-rub back Rubber with 2. 5 to 5 gallons of solution and recharge as necessary to maintain wetness. Use Prozap insecticides for optimal results.