For the NextDent 5100 3D Printer.Features: Print surface – faces downward when printing. The printed part adheres to the holes in the print surface on the underside of the platform. Elevator Guides – the flat surface of the guides stick to the magnetic surface of the print engines elevator arms. The triangular grooves fit over the conical pins on the elevator arms. QR Code/Serial Number – The QR code has the serial number embedded in its pattern to give the print platform a unique identification that can be read by a QR-code scanner. Resin drainage holes – to prevent resin from settling on the top of the print platform.