Product Info Catalog Hardware Builders Hardware Springs 7/16-Inch OD x 1-7/8-Inch-Long Extension Spring, 2-Pack 7/16-Inch OD x 1-7/8-Inch-Long Extension Spring, 2-Pack Request a Quote UPC: 38594000816 SKU: 681056 Model Number: C-81 2 Pack, 7/16" OD, Extension Spring, 1-7/8" Length, .028" Wire Diameter, 8.79" Maximum Deflection, 2.64 LB Maximum Safe Load, Polybag.