This uses a kink-resistant reinforced poly tubing to connect to a drum containing the oil/chemical mixture or organic solution. It is advised to strain the mixture to help prevent blockage in the self-feeder mechanism. The backrub must be submerged for a few hours to completely saturate the rub in the mixture. Then hang the backrub over the container to drain the excess off. With the use of a tap on the drum you can maintain continuous saturation without you needing to attend to it. The tap should only be opened enough to service the backrub. If the mixture is dripping onto the ground, the tap is open too much, resulting in wastage of mixture. A.C. Backrubs are engineered to stand up to the harsh Australian conditions which have been proven over hundred of properties in Australia. Designed for durability, simplicity and saving time. SPECIAL SELF FEEDER If you need to treat mixed size cattle from calves to full-grown beasts, we can make a SPECIAL SELF FEEDER to be hung on an angle.