The Sigma 58mm Lens Cap is a spare or replacement Sigma lens cap for 58mm filter thread lenses.
Sigma 67mm Lens Cap
Pentax 58mm O-LC58 Front Lens Cap for DA 55-300mm / DA 55mm
Pentax 58mm Front Lens Cap for FA 31mm - Silver
Sigma 58mm WR Protector Filter
JJC Rear Lens Cap / Body Cap Combo - Olympus Four Thirds Fit
Canon Lens Cap for 11-24mm f4L Lens