TS3000B. The Geze TS 3000 B surface-mounted overhead door closer is for use on single leaf internal doors that are up to 1,100mm in width and 130kg weight, with a choice of body - only option. This closer can be used on right or left mounted doors, as well as being suitable for use on fire and smoke doors. With a closing force of size 2 to 4, this door closer also features fully hydraulic adjustable latch action, backcheck and closing speed.. Cam-action closer with guide rail. Adjustable closing force and speed. Adjustable hydraulic latch action and backcheck. Sold complete with guide rail, screw pack and installation instructions