... .Site Suitable: Stadium, Driving range,School , Racing Track etc.Maximum Rows: Depends on the site conditionsStructural features1.The understructure is made ... ,5.Riser Hight:181mm. Product features1.Available in 3,4 or 5 rows to satisfy various requirements,and the length of the ... : 148mm/181mm/210mm.Product features1,Available in 2,3 or 4 rows to satisfy various requirements,and the length of the seats ...