Genuine Tektro Aries disc brake pads. This includes two pads (one set) to replace either the front or rear brake pads. Order 2 sets in order to replace both front and rear brake pads.
Check your bike to see if you have Novela or Aries brakes. The Novela brake pads are circular; the Aries brake pads are rectangular. The brake calipers are labeled and will say either "Novela" or "Aires" on them.