11204 1-Inch Diameter by 3/8-Inch Wide Contact Arm Ass'y, Radiused Rubber Wheel for 1/4-Inch Wide or 1/2-Inch Wide by 18-Inch Length Belts, Silver. Unique offset design allows for easy strap polishing Superior belt tracking For use on metal, plastic, fiberglass, composites, rubber, glass and stone Industrial-rated for tough production performance Product Description 415-11204 Features: -Standard on models 40335 and 40500. -Unique offset design. -Strap polishing is easy with this arm. -Standard on models 40320 and 40330. Generic Dimensions: -6 3/4'' workable reach. Dimensions: Overall Product Weight: -0.15 Pounds. From the Manufacturer The Dynabrade Difference: Dedicated to exceeding the expectations of customers, through the innovative design of the highest quality abrasive power tools. MADE IN USA proudly displayed on every pneumatic tool package. Top research and development team dedicated to innovation and improvement. Comprehensive in-house staff of industrial engineers. Unmatch