The Mer-Made Filter 4ANGSS 4" Spare 316 Stainless Steel Basket for FO Series Standard Strainer is a durable basket-style inclusion that assists in pool water upkeep. Made with 316 stainless steel to stand up to continual submersion, this 4" basket strainer helps remove debris that can disrupt chemical balance and water clarity. A clear acrylic lid ensures that contents are easily viewable for as-needed maintenance.