Heavy-duty Cup style stainless steel strainer. Brass-plated locknut and slip-nut included. For 3-1/2" to 4" drain opening. Fits all sinks including heavy cast-iron. Stainless steel clip closure basket. Boxed. No. 1436SSBNS: Drain Opening Size: 3-1/2 In. to 4 In., Finish: Stainless Steel, Material: Stainless Steel, Pkg Qty: 1, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!