Tech giant Apple is recalling one of its three-prong AC wall plug adapters.

The company has said that, in very rare cases, it may break and create a risk of electrical shock if exposed metal parts are touched.

The affected wall plug adapter was shipped from 2003 to 2010 with Mac and certain iOS devices.

The adapters were designed primarily for use in Ireland, the United Kingdom, Singapore and Hong Kong.

They were also included in the Apple World Travel Adapter Kit.

The affected (left) versus the new plug (right) | Image: Apple

Affected three-prong wall plug adapters are white, with no letters in the inside slot where it attaches to an Apple power adapter.

New adapters are white with gray on the inside portion that attaches to the power adapter.

However, Apple USB power adapters are not affected by this program.

In a statement, the company said: "Customer safety is always Apple's top priority, and we have voluntarily decided to exchange affected wall plug adapters with a new adapter, free of charge."

Affected customers should contact Apple to verify their Mac, iPad, iPhone or iPod serial number as part of the exchange process.

Customers can also find an authorised Apple Service Provider, or contact Apple Support directly.

Main image: An example of the affected plug | Image: Apple