This 3-1/2'' strainer is made of durable plastic that withstands repeated use without chipping or fading. With a custom design, this product complements a variety of sinks and color schemes of 's SiOStone granite sinks, and fireclay sinks. This basket strainer fits standard 3-1/2'' drain openings. Comes with a 1-year limited warranty that protects against defects in materials and workmanship and meets ASME 100.19.3-2000 and UPC standards.