Product Info Catalog Hardware Builders Hardware Springs 7/16-Inch OD x 1-1/2-Inch-Long Extension Spring, 2-Pack 7/16-Inch OD x 1-1/2-Inch-Long Extension Spring, 2-Pack Request a Quote UPC: 38594000311 SKU: 680967 Model Number: C-31 2 Pack, 7/16" OD, Extension Spring, 1-1/2" Length, .028" Wire Diameter, 6.18" Maximum Deflection, 2.64 LB Maximum Safe Load, Polybag.