"NATIONAL" SELF CLOSING GATE PVC HINGESTru-CloseSelf Closing Gate PVC HingesFeature An Internal Spring SystemEnsuring Effective Gate Closure Every TimeInternal Stainless Steel Springs Eliminate The Need For Unsightly & Costly External Closing SpringsUse On Vinyl Or Wood Gates Sizes Up To 5" H x 3" W, 55 LB & Point Load Of 450 LBAdjustable Tension, Easy & SafeWill Never Rust Or CorrodeSuper Strong Polymer ConstructionEliminates External Springs, Maintenance Free Self Lubricating, Quick & Easy InstallationLimited Lifetime Warranty