The 6-3/4" OD Strainer for Cast Iron St. Louis Drain is designed to effectively filter debris and prevent clogs in drainage systems. Constructed from durable materials, this strainer is built to withstand harsh conditions while maintaining optimal performance. Its design ensures compatibility with standard cast iron drains, making it a versatile choice for both residential and commercial applications. This product is essential for maintaining the efficiency of your drainage system and prolonging the life of your plumbing infrastructure.