Stainless steel construction for reliable, rust-free service. Suited to daily utilitarian use for long-lasting protection against clogging. Micro-perforation: 2mm dia holes. Efficient anti-clogging shield lets liquid flow seamlessly into the drain while it blocks food particles. 4.5″ overall dia. includes 2.75″ micro-perforated bowl area contoured by a 2-ply metal sheet flat rim to rest over …