... powder coating; other material is available.AdvantageChildren playground, Outdoor playground equipment, fitness equipment Material: National standard Metal ... Usage: Outdoor, park, school -Outdoor easy installation -Certification: CE, TUV, GS, ISO, CCC, ISO9001: 2000 Anti-rust treatment high quality steel ... process the pipe surface.Nuts: Stainless Steel Nuts. High Quality Outdoor Body Building Product