Ultraliner SAC020U (Pack of 4) The Ultraliner SAC020U is a high-quality milking liner designed to provide dependable performance in milking systems using SAC type liners. Manufactured to precise specifications, these liners support stable vacuum levels, smooth pulsation, and efficient milk flow throughout the milking process. The Ultraliner SAC020U features an orifice diameter of 20.5mm and a total length of 304.5mm , ensuring a secure and accurate fit within compatible cluster shells. Correct liner dimensions are 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 SAC020U operates without an air vent, making it suitable for milking systems where controlled air admission is not required. Maintaining balanced vacuum conditions 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 environments. Their robust c