The Beacon Streamliner 70 is a 4-wheel dryline marker and has the largest, most durable molded hopper with a 70lb capacity. The flexible brush agitator improves chalk flow and delivers steady distribution. Tested against two other leading models, the Streamliner 70’s advanced chalk delivery system produced the most consistent solid lines while using 30% less chalk on average. A front-drive wheel allows you to lift the front of the Chalker off the ground to stop chalk flow. Optional Double-Play Aerosol attachment converts your dryline field marker into an aerosol line sprayer, and an optional softball pitcher’s circle kit simplifies lining the pitcher’s circle.