Popular livestock Model 8127 has the features you want and at a great value. Nationally Advertised Prices starting at $13,900 US (16-ft).
Length: 16', 20', or 24'
Width: 7' 0"
Height: 6' 6" clear floor to roof bow
Air Spacing: 6 1/4" Air, 5 11/16" Panel, 6 3/8" Air
Floor: Skid Resistant Extrd Alum; .100 GN Platform
Axles: 7000# (Qty:2)
Tire/Rim: ST235/85R16 Load Range E; 8-hole Silver Modular (Qty:4)
Center Gate: Center with Slider (Qty: 2 on 24'; Qty: 1 on 16', 20')
Escape Door: Curbside - Stock/Combo (33 1/2" x full hgt opening)
Rear Door: Rear Full Swing w/Lockable Slider & airspc m/side