Rubber replacement dust cap for LED conversion kits. These dust caps fit in an 85mm hole in the hard plastic OEM dust cap.
Fits Hole diameter = 85mm/8.5cm/3.4"
Outside diameter = 100mm/10.0cm/3.9"
Inside diameter = 80mm/8.0cm/0.26"
Height = expandable from 25mm (min) to 45mm (max)/2.5cm->4.5cm/1.0"->1.8"