1 Mortise Cylinder Marks Original 26D, chrome silver color size 1 1/8. Just 1 Cylinder. No return, no refunds. Marks are the best cylinders for standard Mortise lock, can be used on Detex Locks like ECL 230D. Can be use on any door lock with a collar if needed to make it smaller size. The Mark MORTISE Cylinder in a 1 1/8 inch size with a polished chrome finish is a high-quality commercial door hardware product by Marks USA. It includes 1 mortise cylinder and 2 keys, making it suitable for both commercial and residential applications. The cylinder is made of brass with a silver color finish, providing durability and security for front doors and entrance doors. This product is designed for universal mounting and is suitable for various security door needs.