Rotunda Series, Brushed Nickel Finish header (top) mount frameless shower door pivot hinge. Solid Brass construction with all moving parts (pins and springs) in precision machined stainless steel. These beveled edge shower door hinges are self-centering when within 15 degrees of closed position. Hinge swings at full rotation. For use with 5/16" - 3/8" Tempered Safety Glass. Rated for 50 Pounds per hinge. Open/Close tested to at least 50,000 cycles. Requires standard Non Mouse Ear glass cutout. 3 Year Warranty. Glass clamp plate size 3-5/8" x 2". Mounting base size 3-5/8" x 13/16".