【Adjustable Length & High Quality Material】 The height of the siphon can be adjusted from 45mm to 115mm according to your needs. The drain and siphon are made of 304 stainless steel, grade A brass and matte black PVD coating to effectively resist scratches, corrosion and rust. The high quality and durable silicone helps to store water effectively and prevent leakage. 【Smart Drainage System】 This drain and siphon set is ideal for sinks with an overflow. It drains faster than conventional sink drains and siphons. The sink features an overflow to prevent water from overflowing and flooding the floor. 【Easy to Use】 Simply press the drain cover to fill or drain the water, which is easier than traditional pull rods or other drainage methods. In addition, you can turn the top cap counterclockwise to unscrew it for cleaning. 【British Standard Size】 G1 1/4 BSPP connection thread. Drain height: 87 mm. Drain diameter: 40 mm at the bottom. Drain pipe: Ø 32 mm to 35 mm (includes white O-ring for