These centre caps are for 16 and 17 inch Enkei RPF1! They do not make a centre cap for the 15x7 inch size and these caps will NOT fit the 15x7 inch size.
It is unfortunate that Enkei has gone to these very expensive fancy metal caps, we are passing them to customers at COST for those that just must have a centre cap but we agree the cost is high....particularly compared with the great bang for the buck that the RPF1 otherwise presents.
Price is per cap. YES, these fit the new 15x8 version RP-F1. The GOOD news is that while caps for just about every other wheel are just plastic, these are aluminum with real carbon fibre centre.