The Wavin Osma OsmaW ABS Knuckle Bend 90° WT 40 (5Z160W) is a high-quality white waste fitting designed for strong, leak-free connections in 40mm waste systems. Manufactured from durable ABS, this 90-degree knuckle bend provides reliable performance, easy installation, and long-lasting resistance against everyday wear. Ideal for both domestic and commercial plumbing projects.