Most likely they are Eze-Lubes. If you have a hole in the wheel dust cap and can see a rubber plug and covering a zerk fitting that's what they are. Nevr-Lubes and standard bearing arrangements have a solid cap, no rubber plug. Nevr-lubes sound like a good idea, but after 'experiencing' them on my last 5er, will NEVER own another with them. That trailer ended up with new Eze-Lube axles and our new 5er (Montana) has Eze-Lubes
If indeed you have the Eze-lube bearings, you will still have to disassemble, clean, inspect relube every couple years. Dexter says 12000/12 months which is a CYA statement. Just be smart about your maintenance intervals. Also, don't expect to pump grease into that cavity ad nauseum. Over filling and using too much pressure (use a hand pump grease gun) can rupture the grease seal.