Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 3/4-In. OD x 2-In., 2-Pack Extension Springs, 3/4-In. OD x 2-In., 2-Pack Request a Quote UPC: 38594001714 SKU: 681247 Model Number: C-171 2 Pack, 3/4" OD, Extension Spring, 2" Length, .105" Wire Diameter, 46.2 LB Maximum Safe Load, Maximum Deflection .51", Polybag.