4PCS Stainless Steel Kitchen Sink Strainer. Stainless steel construction for dependable, rust-free service. Suitable for daily utility use for long lasting protection against clogging. Micro-perforation: 2mm diameter holes. The effective clog shield allows liquid to flow seamlessly down the drain while trapping food particles. above the sink drain. Easy to wash in warm soapy water to keep the mirror finish spotless over time. Dishwasher safe.