Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 7/16-In. OD x 2-3/4-In., 2-Pack Extension Springs, 7/16-In. OD x 2-3/4-In., 2-Pack Request a Quote UPC: 38594001615 SKU: 681213 Model Number: C-161 2 Pack, 7/16" OD, Extension Spring, 2-3/4" Length, .034" Wire Diameter, 6.08" Maximum Deflection, 3.57 LB Maximum Safe Load, Polybag.