NOS (New Old Stock) GAB Sports  Super Coil Lowering Springs. Fitment guide shows Mazda MX-5 Miata NA6 1.6L. 1.8L Miatas have a different part number for the front springs. Part #HPF912 (Front) HPR962  (Rear). Unfortunately  I could not find  lowering heights.

Buyer is responsible for confirming fitment. $30 UPS Ground w/ signature confirmation shipping 48 states. Free LOCAL pick-up, 95035.  eBay may add sales tax.  All sales FINAL.