Satin finish (scratch resistant). Suitable for sink hole size - φ 57mm. All sinks are suitable for left or right orientation. Top metiral made of PVC and stainless steel. Note: This sink basket strainer is suitable for stainless steel sinks. For granite sinks, marble sinks, plastic sinks and ceramic sinks, you need to check whether the strainer head screw length (45mm) fits the sink before purchasing. If the screw is too short, you need to buy a long screw which is not included. Diameter: 84mm For sink hole size : φ57mm Weight: 119g Thickness: 0.7mm How to install: 1. Place the PVC circle over the sink hole 2. Place the stainless steel housing over the sink hole 3. Place another PVC circle on the plastic housing 4. Connect the plastic housing to the stainless steel 5. Use the screw to connect them tightly (screw is included) 6. Insert the strainer. The length of the sink plug screw is 45mm. You need to check if the length of the strainer plug screw (45mm) fits the sink before