Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 1/2-In. OD x 1-5/8-In., 2-Pack Extension Springs, 1/2-In. OD x 1-5/8-In., 2-Pack Request a Quote UPC: 38594001653 SKU: 681239 Model Number: C-165 2 Pack, 1/2" OD, Extension Spring, 1-5/8" Length, .080" Wire Diameter, .36" Maximum Deflection, 31.3 LB Maximum Safe Load, Polybag.