G4 Lampholder with 150mm Silicon Cable.
These are replacement G4 ceramic lampholders normally found in downlights and alike.
The ceramic fitting is 17mm in diameter and 9.5mm thick.
It has 2 x 3mm fixing holes that are 12mm apart.
Tails are silicon covered flex 150mm long.
Lamps that fit are:-
MR11 which is 4mm pin spacing, normally a 35mm diameter lamp
MR16 which is 5.3mm pin spacing, normally a 50mm diameter lamp