Through Spindle & DIN Flange Coolant. Thank you for your interest in this item.We do our best to accurately describe each item as best as possible. If you have any questions or require any additional information send us a message and we will happily assist you in a timely manner. We are happy to offer these services. Our mission is to please all of our customers. Please let us know if you have any questions or concerns. We are happy to help.