Freedom Aerial Dog Run Trolley with Comfort Harness FADR-LD/SD/HD-CH Freedom Aerial Dog Run Trolley with Comfort Harness FADR-100HD-CH HeavyDuty (Dogs up to 70 Pounds) Overhead Cable Length 100 FT (Lead Line Length 15 FT) Harness Size: Large/XL: 16-33 inch neck and approximately 60-100 lbs Give your dogs the freedom to roam without the fear of them running off!