Silencer Compatible Grainger Part Number 31XG58 31XG59 31XG60 Compatible Manufacturer Model Number SM-61-6133 SM-63-6133 SM-63-6133C SM-65-6133 SM-65-6133C SM-65-6233 SM-65-6233C SM-66-6133 SM-66-6133C SM-66-6233 SM-66-6233C Includes Not Applicable Material Plastic Steel Number of Pieces 1 Overall Diameter 19 mm Overall Length 34 mm Overall Width Not Applicable Product Type Sander Muffler