Sample Prep Cartridges: Tube carrier for sample input; for use with the QIAsymphony SP 8-well (336) For use with the QIAsymphony SP 12 sleeves of 28 cartridges per case. 98 cases available. $85/case, discount for multiple purchases ** Please reference item #240116-2600-02 when contacting us about this listing. Return Policy Items are sold as-is as described and pictured. Most items come with a 7 day option to return and a 30 day limited parts warranty. Feel free to call before you buy. 888-649-6497