Check the listing for details. Danner Pondmaster Replacement Impeller Assembly 700 gph for pump MD7 PM7. Condition: New. Listed at 19.99 USD. Danner Replacement Impeller Assembly Model #12585 Replacement impeller assembly for MD7 or PM7. MD7 is a 700 gph Pondmaster Magnetic Drive pump. PM7 is a 700 gph Pondmaster Pond-Mag pump. The newest impellers we received have white fins and housing. The old ones were all black. Just an FYI. I'll try to update the pic when time permits. To replace on a Pondmaster pump, first unplug the pump. Remove the 4 screws holding the outflow cover. Remove the cover. Simply remove/replace the impeller with your fingers. Reinstall pump cover and test. We will not allow returns/refunds if the impeller has been opened! Sorry. We will combine shipping whenever possible. If you would like to know the shipping charges before paying for your combined order, please choose the "Request Invoice" option during checkout (or "Commit To Buy" without actually paying). Shoot us an email if you need assistance. Thanks for visiting my store. We are here to help you with all of your gardening needs. Please email us with any questions or concerns.