This is a quality OEM Diff Flange, not a cheap copy one.

This is a 4 bolt diff flange conversion kit to replace the rubber drive coupling (doughnut) on the rear of Discovery 300Tdi when you fit a wide angle rear propshaft. It is required when you fit a suspension lift on late Discovery300 as the rubber drive coupling doesnt last long. A new propshaft will also be required as wide angle propshafts have a 4 bolt flange instead of the 3 bolt as standard.
This 4 bolt flange kit will also fit front diffs.
You can also use one of these 4 bolt flange kits to fit an earlier Discovery & RRc 4 bolt flange propshaft on later Discovery & RRc.

This flange comes complete with a built in 12.5mm spacer as many others dont have the spacer, if you do fit one without the spacer it will cause the diff to seize up. It also has a recessed metal mud shield to help stop mud and debris getting to the oil seal,

(please note the built in spacer is not a propshaft spacer, it is a spacer that is part of the internal part of the flange, the piece that goes into the diff itself where the oil seal runs on)