Top wing tree. Aero (squished tube). Plated 4130 Chrome Moly. Aluminum adjusters. 3/4" adjustment holes, with a total of 3" of adjustment. "X" design for lateral and horizontal strength. Adjuster pins not included. TECHNICAL SPECS: Width At Top: 26 1/4" Width At Bottom: Min: 26 1/4" Height: Min: 18 1/4". Max: 21 1/4". Adjustments: 3/4" Wing Slider Spud: 5 1/2" from top mount (center to center). Material: 4130 Chrome Moly Adjuster Material: Aluminum Wing Slider Mount: 3/8" Wing Mounts: 3/8" Finish: Plated Total weight: 3.75 lbs