Material: The basket strainer is made of high quality 304 stainless steel and PVC. Easy to install: There is a soft washer on the top and bottom of the sink, just use a coin to turn the screw. Widely used: 114mm sink collection strainer drain plug suitable for sink hole size: 83-90mm, please check your sink hole size before placing an order. Package Included: 1 x Basket Strainer, 1 x Overflow. Note: This sink basket strainer is suitable for stainless steel sinks. For granite, marble, plastic and ceramic sinks, you need to check the strainer plug screw length 45mm whether it is suitable for the sink before purchasing. Note: Please check your kitchen sink hole size before purchasing. Material: PVC + 304 stainless steel For sink hole size: 83 - 90mm How to install: 1. Put the PVC circle on the sink hole 2. Put the stainless steel housing on the sink hole 3. Put another PVC circle on the plastic housing 4. Connect the plastic housing with the stainless steel one 5. Use the screw to connect them firmly (screw is included) 6. Put the strainer 7. Connect the overflow with the kitchen sink basket strainer