We are interested in ONLY 6808-2RS bearing product with galvanic tratment Zinck or better Nickel finishing for save from the RUST problem. Understand that the request about 40.000 is only a trial order for us...I mean... quantity is always LARGE. We need to have your offer and your complete product data sheets. ( specification of the complete product and each component ... from balls inside...to plastic / gum for the edge ) We use inside to a window mechanism...so the speed is not a must...but must need the resistance at the effect of the time and of the outdoor agents. Please, consider also we are already in good cooperation with other supplier so pease send your best competivie price.