This listing is for a 1 pair of top quality, self aligning industrial grade steel hinges. Includes 1 left hand hinge and 1 right hand hinge. Self-aligning ball means the door and hinge do not have to align perfectly. Smooth operation even on slightly miss-aligned doors. Brass alignment ball for long life. Extra heavy duty 6mm thick. As fitted as an OEM part by many truck/trailer manufacturers but also popular as a high quality alternative on motorhomes, caravans etc... Weld-on Heavy Duty Design or can be drilled and bolted. 270 Degree Opening. Supplied in self-colour steel. 50mm Tall and 250mm Wide. (When open)