Product Info Catalog Hardware Builders Hardware Springs Extension Springs, 3/8-In. OD x 6-1/2-In., 2-Pack Extension Springs, 3/8-In. OD x 6-1/2-In., 2-Pack Request a Quote UPC: 38594002391 SKU: 681460 Model Number: C-239 2 Pack, 3/8" OD, Extension Spring, 6-1/2" Length, .047" Wire Diameter, 4.67" Maximum Deflection, 9.77 LB Maximum Safe Load, Polybag.