The 23 mm long sleeves from Wago are specifically designed for use with the conductor markers of the 211-821 series. These cable connections provide a reliable and secure way to establish electrical connections. With a diameter of 4 mm, the sleeves are made of transparent plastic, allowing for easy visual inspection of the connections. The transparent color ensures that the sleeves can be used discreetly in various applications. Each sales unit includes 500 pieces, providing a sufficient quantity for extensive projects or repairs. The use of high-quality plastic ensures a long lifespan and resistance to various environmental conditions. These sleeves are a practical solution for anyone needing efficient and secure connection technology.