Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 1/4-In. OD x 3-1/4-In., 2-Pack Extension Springs, 1/4-In. OD x 3-1/4-In., 2-Pack Request a Quote UPC: 38594001578 SKU: 681205 Model Number: C-157 2 Pack, 1/4" OD, Extension Spring, 3-1/4" Length, .025" Wire Diameter, 4.1" Maximum Deflection, 2.64 LB Maximum Safe Load, Polybag.