Gentlemen, First, please accept our apologies on behlaf of our European distribution and our factory as well. We should have answered your question instead of sending you to distribution for the answer. They are not the best foks to answer this kind of question. Our techincal support team is quite useful for questions like this. Please consider our 800-266-7225 number and ask for tech support. That said, the CSA brackets are not intended for use on the slim 5 racks. To be used, the CSA requires Z style rails and becuase of the slim design of the 5-37 Z rails are not offered. Additionally, the CSA 18 or 20 is not the correct depth to fit properly in 20" deep slim 5. The product we might suggest would be the SH-5A. This is a 4 pt. mounting, fully vented shelf with a weight capacity of 250 lbs. If this option doesn't fit your needs please call us at the factory and we'll take you through some other suggestions.
Manager of International Sales
Middle Atlantic Products