The reducers and flexible couplings are designed for the connection of two wastewater pipes with different or the same diameter or of the same or different materials and/or surfaces. Suitable for vertical and horizontal installation, outdoor and indoor and can be combined with each other. Manufactured in EPDM and TPE, materials resistant to extreme temperatures (from -40° to +120° C) and UV rays. The sleeves are fitted with AISI316L stainless steel clamps at the ends for better fastening. Very easy to install.