Suitable for the following models:
ThinkPad R60  
ThinkPad R61
ThinkPad R61i 14-inch Wide  
ThinkPad R61
ThinkPad R61i 15-inch Standard  
ThinkPad R61
ThinkPad R61i 15.4-inch Wide Selected Machine Types. Compatible Machine Types: 7642, 7643, 7644, 7645, 7646, 8914, 8918, 8919, 8920, 8927, 8930, 8932, 8933, 8934, 8935 
ThinkPad R400  
ThinkPad R500  
ThinkPad T60
ThinkPad T60p
ThinkPad T61  
ThinkPad T400  
ThinkPad T500  
ThinkPad W500  
ThinkPad Z60m
ThinkPad Z60t  
ThinkPad Z61m
ThinkPad Z61t  
Lenovo Easy Reach Monitor Stand (55Y9258)
ThinkPad Adjustable Notebook Stand (40Y7676)


ThinkPad Essential Port Replicator (250510W) offers:

Left corner alignment for easy system attachment
Convenient buttons for easy system ejection
Device ports:
Four USB 2.0 ports
PS/2 port for mouse
VGA analog monitor video port
Communication ports - Gigabit Ethernet (RJ-45) and modem (RJ-11)
Cable lock slot physically secures the ThinkPad notebook and ThinkPad Essential Port Replicator.
When a cable lock is inserted into the lock slot on the back of the ThinkPad Essential Port Replicator, the cable lock secures both:
ThinkPad Essential Port Replicator to the workspace (desk, wall, pole)
ThinkPad to the ThinkPad Essential Port Replicator, via an internal locking mechanism.