Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 5/8-In. OD x 2-1/2-In., 2-Pack Extension Springs, 5/8-In. OD x 2-1/2-In., 2-Pack Request a Quote UPC: 38594001417 SKU: 681171 Model Number: C-141 2 Pack, 5/8" OD, Extension Spring, 2-1/2" Length, .072" Wire Diameter, .92" Maximum Deflection, 19.1 LB Maximum Safe Load, Polybag.