JFC calf teats encourage natural suckling action allowing milk to be delivered to the calf at an optimum rate. The inverted nipple is ideal for the newborn calf by encouraging sucking action, increasing saliva production and thus improving digestive action on the milk. These teats can be fitted to any feeder prebored with 22mm holes. Simply fit by pulling teat strongly through the hole until the wall of the container lies in the teat groove. Please note when fitting teats that the arrow shape on the base of teat must point up for correct alignment. In this position the milk can flow through the slot once calf sucks.