For Institutions & Core Facilities — Net 30: If your company have credit reference sheet, please email info@humimmu.com to us, you are allowed to pay within 30 days after confirmation by our financial department. • Purchase orders: To order, send a Purchase Order to info@humimmu.com. • W-9: If your purchase department wants a W-9 form, please send an email to info@humimmu.com. We will get it back to you in 1 business day. See Get W-9 Form. • Tax-exempt: Tax-exempt? Contact us before ordering. • Bulk inquiries: Humimmu LLC Corporation manufactures most of the products it sells and is pleased to offer discounts on bulk orders including those for OEM purposes. For inquiries, please write us at: info@humimmu.com, or use Contact Us.