Black plastic cap with built-in five pin tumbler lock. Supplied with two keys. Gasketed to prevent possible moisture from entering the tank. This locking cap will fit all Perko Chromalex gas fills already in use. Skin packed.
| Brand | Perko |
| Fits | 0520, 0527, 0528, 0557, 0599, and 1270 Series Fills |
| Size | 1-7/8" OD |