The 3/8" OD x 20" Corrugated Closet Riser with Nut in PVD Polished Brass from Braxton Harris is designed for efficient plumbing installations. This riser features a 3/8-inch outer diameter and a length of 20 inches, making it ideal for connecting toilets to the plumbing system. The corrugated design allows for flexibility and ease of installation, while the PVD polished brass finish provides a sleek, durable surface that resists tarnishing and corrosion. This closet riser meets industry standards, ensuring a reliable and long-lasting solution for your plumbing needs.