To both maximise the milk yield and optmise the comfort of your cows, a teat cup liner should fit "like a glove". The Classic teat cup liner from WestfaliaSurge is designed for the fast milking of narrow-teated cows. Made of nitrile synthetic rubber, it allows maximum milk extraction with reduced air admission and increased teat contact for minimal slippage. The three-piece liner (comprised of liner, sight-glass and short milk tube) can be assembled to suit your cows, and the milk flow can conveniently be observed through the sight-glass. For the very best udder health and teat condition we recommend that the Classic teat cup liner (in common with all other rubber liners) is replaced after 750 hours or six months, whichever is earlier.