had one of these missing on the Cyan drum interfacing inside the printer. used my calipers and got close enough measurements and it takes some force to snap in but it fits good enough. printed in PETG at 100% infill . sometimes one of the interfacing nipples breaks off when removing the supports, but it seems to work just fine with only one. might have better luck with resin printing, but PETG works good enough for now. Should work with some older model Brother printers, the two I tested it on were a HL4150CDN and a MFC9970CDW