SunBlaster Humidity Domes are designed to maximize overall performance, economy and extend longevity, while providing the best possible performance for all Indoor growing. Please note, our automatic shipping software is not well calibrated for bulk purchases of this item. If you receive an error message at check out, please contact us at orders@halifaxseed.ca. For the most streamlined process, please include a screenshot of the items in your cart, your mailing address, and phone number. We will contact you via phone to process payment.