Product Info Catalog Hardware Builders Hardware Springs Extension Spring, 1-1/16-In. OD x 8-1/2-In. Extension Spring, 1-1/16-In. OD x 8-1/2-In. Request a Quote UPC: 38594002711 SKU: 681577 Model Number: C-271 1-1/16" OD, Extension Spring, 8-1/2" Length, .080" Wire Diameter, 19.3" Maximum Deflection, 15.5 LB Maximum Safe Load, Bulk With UPC.