2.5mm plug to 6.3mm Socket

This will convert a 6.3mm (large) Jackplug to a 2.5mm Jackplug in mono.

2.5mm is smaller than the standard headphone jack which is 3.5mm so please make sure that it is a 2.5mm plug you require.

2.5mm was used on some of the early Apple products and is also used on some game chairs.