Ultraliner GM85U (Pack of 4) The Ultraliner GM85U is a high-quality milking liner designed to deliver reliable performance in milking systems using Gascoigne type liners. Manufactured to precise specifications, these liners support stable vacuum levels, smooth pulsation, and efficient milk flow throughout the milking process. The Ultraliner GM85U features a liner hood diameter of 65.0mm , an orifice diameter of 24.0mm , and a total length of 325.0mm , ensuring a secure and accurate fit within compatible cluster shells. Correct liner sizing is essential for maintaining proper liner movement and effective teat massage, helping promote efficient milk extraction while supporting cow comfort during milking. Designed as an unvented liner , the Ultraliner GM85U operates without an air vent, making it suitable for milking systems where controlled air admission is not required. Maintaining balanced vacuum levels within the cluster helps ensure smooth liner operation and consistent milking performance throughout each milking cycle. Manufactured from durable materials that conform to BfR and RAL guidelines , these liners meet recognised standards for materials used in food-contact dairy envir