I changed the rooted sheet on both springs of the Mitsubishi L200 three times in this office, all three times the installed sheets burst in the middle. Every time the answer is from https://resservis.by (they are http://5050.by , 6760532 Alexander) that supposedly the whole load is only on their sheets, so they burst. For the money that I left with them, you could buy original springs. Forget about the guarantee, in all cases only the client is to blame and the level of communication with the client is appropriate.