Prime-Line Products G 3131 Sliding Window Tandem Roller Assembly, 3/8 Brass Wheels, 2-Pack

Product Description This is a Sliding Window White plastic housing; center grooved tandem brass rollers; used on Merzon windows; 2 position height adjusment housing can snap apart for single glazed, or left as tandem for dual glazed. From the Manufacturer This is a Sliding Window White plastic housing; center grooved tandem brass rollers; used on Merzon windows; 2 position height adjusment housing can snap apart for single glazed, or left as tandem for dual glazed.