Product Info Catalog Hardware Builders Hardware Springs 7/16-Inch OD x 2-Inch-Long Extension Spring, 2-Pack 7/16-Inch OD x 2-Inch-Long Extension Spring, 2-Pack Request a Quote UPC: 38594001356 SKU: 681155 Model Number: C-135 2 Pack, 7/16" OD, Extension Spring, 2" Length, .062" Wire Diameter, .76" Maximum Deflection, 18 LB Maximum Safe Load, Polybag.