Caution At least three different versions are obviously under the same (!) Amazon entry by the same manufacturer shipped (without adapter, with adapter, with connecting rods). This has the manufacturer towards me also confirmed (perhaps there are more versions?) But would make sure that every buyer always get only the same version. This is definitely NOT THE CASE, for example. IF YOU ordered. Whoever ordered in several batches in succession must expect to receive completely different models. If you compare the individual shelves this is perhaps not a problem. You have to rethink every shelf structure, can not work smoothly in succession away. OK perhaps goes, but the different versions do not match! Who wants to screw the shelves standing side by side against each other, so as to improve the stability will experience an unpleasant surprise. The holes do not fit each other! screwing of model 1 and 2 is in 3 model1 and it does not work! When I inquired, I was told by email, you would clarify this; until today (5 weeks later) no reply! That's not all: in the model with connector lacked such. In my mail back (5 weeks ago) I was told, you will post this. You guessed it? There was no missing link, but two strips supplied (for the other model without connector). The seller has obviously lost track myself. On my repeated complaints out they apologized and said to the correct replacement part delivered. Even then I wait until today! Ultimately, I had to go to the Bauhaus and tinker.
By the way: The support boards not 100-ig fit partially in the frame. But this is a prerequisite that you can put only 100 grams it.
The support boards are i.Ü. from thinnest pressboard. Whoever intends to set up the shelf on a partially damp place (basement, attic) should keep this in mind, draws moisture, after two or three years ...