I am the manufacturer of the BimmerSpinner. Shaka - I am happy that you liked your new set.

They are fabricated using stock OEM center caps, so the quality of the logo is excellent - typically BMW. As you can see from Shaka's photos, the grey plastic ring is removed, and the chrome ring around the roundel logo is now framed by a black plastic ring. This sets off the logo much better than the original design, and the black frame looks better against alloy wheels.
You can see the details here:
BimmerSpinner

To order your set under the X5world group buy organized by motordavid, which is valid until August 6, send me an email and I'll give you the mailing address for your check.

Jerry Skene - President - Skene Design