PlumBest C54402 3-Inch by 4-Inch PVC Offset Closet Flange with Plastic Swivel Ring Less Knockout Plastic ring will not deteriorate 360-degree rotation Two radial slots and two grooved slots for closet bolts Six screw holes for securing to floor 3-Inch x 4-Inch fits over 3-Inch or inside 4-Inch Schedule 40 DWV pipe