[Odour resistant design]-The basin waste kit built in anti-odour device. When no water is discharged, the odour-proof core is colsed to prevent odours from coming up. [Anti-clogging]-Sink waise drainer contains a filterable sink plug. It effectively prevents hair and debris from entering the drain and causing blockages. [Double drain connection]-With dual connector design, suitable for vertical drainage or wall daainage. Retractable drains are freely adjustable and length range from 6.7 to 34 inchs (17~94cm). Suitable for 1.5~2in drain aperture. [Easy to install]-Both non-overflow bathroom sinks and overflow bathroom sinks can be suited. No tools are needed to install this bathroom sink drain kit, and there's no need to call a professional plumber, you can install it yourself! [Easy to clean]-The detachable design of pop-up sink plugcan easily clean the debris in the drainer without overall disassembly, making regular cleaning effortless.