From The Anvil 4 Inch Ball Bearing Butt Hinge, Satin Stainless Steel – 91039 (sold in pairs) SATIN STAINLESS STEEL

Manufactured with ball bearings in the knuckle to provide extra strength and a smooth action that will last for many yearsnnManufactured from grade 201 stainless steel and CE marked (Grade 13)nnComplies with BS EN 1935-2002 (assessed for use on 30, 60, 90 and 120 minutes timber fire doors and 240 minutes on steel fire doors)nnFinish: Satin Stainless SteelnnDimensions:nn- Overall Size: 102mm x 76mmnn- Leaf Width: 30mmnn- Thickness: 3mmnnA pair and a half (3 hinges) can be fitted to provide extra strength for heavier doorsnnSupplied as a pair with matching SS wood screwsnn