The Sigma 58mm Lens Cap is a spare or replacement Sigma lens cap for 58mm filter thread lenses.
Sigma 67mm Lens Cap
Sigma 72mm Lens Cap
Pentax 58mm Front Lens Cap for FA 31mm - Silver
Sigma LC950-01 Cover Cine Lens Cap
Samyang Replacement Lens Cap for 35mm Lens
Hama 55mm Universal Lens Hood with Lens Cap