Compatible BouMatic R1EX Vented Liner (Pack of 4) The Compatible BouMatic R1EX Vented Liner (Pack of 4) is a high-quality replacement liner set designed for use with compatible BouMatic milking systems . Manufactured from durable dairy-grade rubber, the Compatible BouMatic R1EX Vented Liner (Pack of 4) is engineered to deliver reliable milking performance, efficient milk flow, and optimum cow comfort throughout every milking session. Milking liners are the only part of the milking machine that comes into direct contact with the cow, making them one of the most important consumable components within the parlour. Regular liner replacement helps maintain milking efficiency, supports teat health, and contributes to the production of high-quality milk. Worn liners can affect milk flow, pulsation performance, and overall cluster efficiency, making routine replacement essential. The vented design helps promote smooth milk transfer and stable cluster performance, ensuring consistent operation during milking. Manufactured from high-quality materials suitable for demanding dairy environments, these liners are designed to withstand regular cleaning procedures, dairy chemicals, moisture, and d