Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 3/4-In. OD x 2-7/8-In., 2-Pack Extension Springs, 3/4-In. OD x 2-7/8-In., 2-Pack Request a Quote UPC: 38594001875 SKU: 681320 Model Number: C-187 2 Pack, 3/4" OD Extension Spring, 2-7/8" Length, .105" Wire Diameter, .95" Maximum Deflection, 46.2 LB Maximum Safe Load, Polybag.