You searched for "triangular insert"
Schneider Electric
Schneider Electric NSYT Series 8mm Triangular Lock Insert For Use With Spacial S3X
Part: NSYTT8CSX
Triangular lock insert for Schneider Electric Spacial enclosures.
Schneider Electric
Schneider Electric NSYT Series 6mm Square Lock Insert For Use With Spacial S3X
Part: NSYTC7CSX
Six millimetre square lock insert for Schneider Spacial S3X electrical enclosures.