Misty Gully Collagen Sausage Casings 23mmThe Misty Gully range of premium sausage skins and casings from the finest Australian manufacturers, have all your small goods needs covered. These Collagen sausage casings will make a small to medium size sausage 23mm. A great sausage making casing for beginners as it is easy to handle, needs no soaking prior to use and can be easily stored without needing to be refrigerated. 29 metres of casing. Enough casings to make approximately 10kg of sausages.