Prime-line g 3131 sliding window tandem roller assembly, 3/8" brass wheels 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. package quantity 2.

Prime-line g 3131 sliding window tandem roller assembly, 3/8" brass wheels 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. package quantity 2.