Spendor A-Series Optional Grilles

On Spendors’ website it reads that grilles can be had as an option. Myself, having a current set of A4’s, am wondering about this. 

Has as anyone bothered to purchase and how are they applied? Velcro?

Thank you Ladies and Gentlemen! 
Years ago I had the SA1. The grilles were attached with magnets. This must be something new that the grilles are an option!
I recently purchased the A7s, and ordered the grills a month later. Very well designed, magnetically retained, look great and I cannot notice a difference in SQ. Just nice having those drivers protected from the unforeseen occurrence.