It features a diameter of 7/16 in. These extension springs are designed with single loop closed ends for easy and reliable fastening to fixed and moving parts Product Description These Handyman Single Loop Closed Extension Springs by Prime-Line Products are constructed of durable spring steel, and they come finished in a beautiful, corrosive-resistant, nickel-plated finish. and a length of 10-1/4 in. Extension Springs By Size Prie-Line SP 9645 Extension Spring, Spring Steel Construction, Nickel Stiff Spring Spring dimensions: 7/16 inch outside diameter, 10-1/4 inch length, 0.041 inch wire diameter, 5.6 lbs. maximum safe load, 17.5 inch maximum deflection Prime-Line SP 9638 Extension Spring, Spring Steel Construction, Nickel-Plated Finish, 0.041 GA x 7/16 In. x 10-1/4 In., Closed Single Loop (Single Pack) · 4.2... Springs like these are used for a variety of household and professional applications, and they feature a generous deflection length of 17.50 inch. Used for a variety of household applications. Constructed of durable spring steel (tempered steel wire) to provide optimum retraction when stretched Swivel SP 9638 Prime-Line 0.041 x 0.43 x 10.25 in. Extension Spring 041 gauge heat tempered spring steel wire. Cheers US Business Card Holder for Desk Metal Business Card Display Holders Mesh Business Cards Holder Stand Desktop Name Card Organizer, Capacity: 50 Cards, Black From the Manufacturer This extension spring is constructed from . These springs are easy to install and are used by many.