Product Info Catalog Hardware Builders Hardware Springs 1/2-Inch OD x 2-1/2-Inch-Long Extension Spring, 2-Pack 1/2-Inch OD x 2-1/2-Inch-Long Extension Spring, 2-Pack Request a Quote UPC: 38594001035 SKU: 681072 Model Number: C-103 2 Pack, 1/2" OD, Extension Spring, 2-1/2" Length, .018" Wire Diameter, 2.14" Maximum Deflection, 2.44 LB Maximum Safe Load, Polybag.