Hello Sirs, (our email office(at)samruk.eu) We are european producer of Al-Si white microspheres, fly ash type. We are mainly focused on selling finest fractions of white microspheres (up to 300 micrometers of diameter), but thicker fractions can albo be available. Fractions selections not mentioned in offer can also be prepared. Our production capacity is enough to cope with the biggest orders. Should you have any questions please do not hesitate to contact me by e-mail or cell phone- we speak and write English very well.If you are interested we can send you offer containing fractions with their prices and terms of delivery. Free samples of our products (up to 11 lb) are available- they can be sent via courier service.Thank you for your consideration,Kindest regards,Sales Manager Wojciech Oskard