Bulldog 190704 Direct Weld Top Wind Square Jack, 15", 8,000 lbs CapacityBulldog 8,000 lbs. support capacity square jack serves the agricultural, industrial, construction, horse livestock trailer, and utility cargo trailer markets. The compact design of these jacks makes them ideal for tight fitting applications where 3" and 4" square tube jacks are too big Highlights: Use the painted outer tube as the final finish or primer Zinc plated inner tube and drop leg 4. 7" Outer inner tube overlap results in optimal side load