Product Info Catalog Hardware Builders Hardware Springs 5/16-Inch OD x 1-1/2-Inch-Long Extension Spring, 2-Pack 5/16-Inch OD x 1-1/2-Inch-Long Extension Spring, 2-Pack Request a Quote UPC: 38594000250 SKU: 680942 Model Number: C-25 2 Pack, 5/16" OD, Extension Spring, 1-1/2" Length, .020" Wire Diameter, 7.62" Maximum Deflection, 1.39 LB Maximum Safe Load, Polybag.