40mm Diameter Polypropylene Plastic Bottle Trap A Must For Trapping Debris,the Used Water Goes Down the Basin Waste, Into Drainage Pipe, and Straight Into Bottle Trap. Special Feature: Bottle Trap Is An Essential Element Of the Basin's Plumbing. Able To Trap Those Waste and Dirt Which Is Accumulating. Prevent Foul Smells From Flowing Back Up Through Our Drainage Pipes. Bottle Trap Is Used To Install At Bottom Of Basin. High Quality And Durable Product. Made in Malaysia Product.