1.TPR material, not very aging, durable, easy to clean, a rush is net. 2.Vortex drainage, unimpeded, swirl shape design, drainage and no water. 3.Good sealing, no leaks, bugs and odor from sewer and odor. 4.squeezes the design, deodorant, and gently press it, it can quickly waterproof, easy and convenient. 5.10 cm large diameter cover, barrier odor, closed water storage, suitable for water tanks and floor drain of 10 cm or less.