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.
Pads have green backs. Comes with spring but no cotter pin in Tektro branded packaging.
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.