Good Day Thank you for your email. We use abrasive filament in our brushes and are looking for a new supplier. I have attached a picture of the filament and will be able to send you samples if needed. Please check the attachment and let me know if you can supply the product and weather you need samples. Thanks and regards On behalf of MR. JNR 谁能生产请与我联系 MSN:yoland1009@hotmail.com QQ: 350361654