Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 1/2-In. OD x 5-In., 2-Pack Extension Springs, 1/2-In. OD x 5-In., 2-Pack Request a Quote UPC: 38594002230 SKU: 681411 Model Number: C-223 2 Pack, 1/2" OD, Extension Spring, 5" Length, .072" Wire Diameter, 2.15" Maximum Deflection, 23.5 LB Maximum Safe Load, Polybag.