Most RMJ designs use standard (with ball and coil) or minimalist style in stainless steel or gold-plate; see individual listings for details. If you'd like to change the offered earwire to minimalist, standard or a post in stainless steel, you can either add a note to your order during checkout, or select the appropriate style here, and I'll make the adjustment. There's no up-charge fee for this swap.
If you'd like any other changes, upgrade fees apply for lever back and screw back designs, and for all styles in sterling silver, gold-fill or hypoallergenic niobium. Select your metal and style on the earwire upgrade page.
Niobium is available in a few select colors (they won’t match the aluminum exactly, due to differences in how the colors are achieved, but often work perfectly well.)
If you would like a different earwire style, please let me know in advance if you'd like to make sure I have what you're looking for.