https://www.prehungdoors.co.uk/product/ball-bearing-butt-hinge-76x51-mm-straight-corners-polished-stainless-steel/
Ball Bearing Butt Hinge 76x51 mm Straight Corners (Polished Stainless Steel) - Prehung Doors
Nov 4, 2021 - Features Two ball bearing joints Grade 7 BS EN 1935 Dim. (L x W) 76 x 51 mm Material Grade 201 stainless steel