So if any of you know where can I buy, just let me know. It is hard to find this kind of things.

Hello. There are a lot of such services on google, friend

Konstantine99:
Hello, friend. You are definitely right, it's pretty difficult to find a really good service with linear sliders. I am an engineer, and I am trying to build a very complicated mechanism and I was looking for teleskopschienen. Fortunately, I have found a really good german company that provides such services. I was really satisfied with the quality and the price of their work. I think that it's the best company on the market, I would really recommend you to use their services, you won't be disappointed.

Thank you, very useful