National Hardware N185-207 V521 Spring Hinge in Brass Product Description Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing quality hinges for all of your industrial, residential, commercial and specialty needs. With a wide array of finishes and corner options, there's a residential hinge application ideally suited to fit your interior project needs. From the Manufacturer Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing quality hinges for all of your industrial, residential, commercial and specialty needs. With a wide array of finishes and corner options, there's a residential hinge application ideally suited to fit your interior project needs. Features Manufactured with cold-rolled steel Closing speed is adjustable Fits standard hinge cutout Tension is adjustable 1/4 inch radius round corners Hinge is UL approved for fire doors Manufactured with cold-rolled steel Closing speed is adjustable USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.