Magneteat Liner Blank Plug (Pack of 3)Teats are magnetic Magnetic teat stops stick to metal surfaces in the parlour Blank plug that slots into the cluster liner for cows with three teats Pack of 3 The Magneteat is a magnetic teat dummy that sticks to the steel surfaces in your milking parlour. This is a blank plug that slots into the cluster liner for cows with three teats. It is magnetic, so sticks to metal surfaces in the parlour. Attach to stall work milk line it will be sticking