This is a pair of new plastic front side lamp/indicator lenses with rims, correct for an MGA 1500, early MGA Twin Cam, AC Ace and Aceca, Cobra or Turner. The quality is really good, with super chrome plating on the steel rims. They are marked "L539."
We also sell complete lamps, and carry a good supply of used and NOS L538 and 539 lenses in red, amber and clear; see Related Products below. We have more that aren't listed, so if you don't see what you're looking for, please contact us.