The Timsan TPS 3400 Towable Passenger stair is suitable for servicing aircraft with door sill heights between 2.2 to 3.4m. Based on a hot dip galvanized chassis, it has an 8.5 minimum turning radius and can be towed at speeds up to 15 km/h. Other features include hand operated height adjustment, hydraulic stabilizer, and stair lighting powered by a 12 V DC 60 Ah battery.