These Vinex Spring Back Hurdle are the ultimate training hurdle for schools and clubs.Made of 20mm square steel tube powder coated frame for durability and easy height selection by snap locking method.Uprights are made of 22 mm Aluminium Round tube.Spring mechanism helps the hurdle to come back to its position when knocked down by athlete.Features height adjustable aluminium uprights from 460mm to 762mm in 76mm increments.