Buyers Products Large Folding Step is designed for use on trucks and emergencyvehicles and conforms to NFPA specifications. The large 7-1/4 in. by 6-3/4 in.step features chrome-plated, die cast construction and stainless steel springsto keep the step firmly open or closed as needed. The chrome-plated finish addscorrosion protection and a custom look. Chrome-plated, die cast construction for durability Stainless steel springs keep step firmly opened or closed for reliable use Conforms to National Fire Protection Association (NFPA) specifications for use on emergency vehicles Large 7-1/4 in. by 6-3/4 in. step platform accommodates heavy boots and equipment