A sheet of printbite from oozenest also available from.
Glass sheet for wanhao i3.
This would be your most convenient and least expensive option as glass usually runs between 3 10 per sheet with custom cutting.
3d printer glass bed upgraded borosilicate glass plate w corners cut for monoprice maker select v2 anet a8 a6 wanhao duplicator i3 220x220x3mm with4 glass clips 4 5 out of 5 stars 63 15 99 15.
Compatble with maker select wanhao duplicator anet a8 and other 3d printers.
A sheet of glass cut to size.
219x219mm outer size see attached drawing for details.
I got borosilicate from oozenest and they will cut to size including chamfering the corners however you might not want to do this not because it s a bad product but see below a replacement wanhao magnetic print bed bottom section from wanhao uk.
The wanhao duplicator i3 cannot print high temperature materials like peek abs pc pei carbon fiber or glass fiber.
Sourcing a glass sheet.
Make sure this fits by entering your model number.
To print with these materials the extruder temperature must exceed 572 f 300 c whereas the extruder on the wanhao duplicator i3 has a maximum temperature of 500 f 260 c.
Thick 4mm glass plate will not warp or bend under heat.
You can usually find a local hardware store that will cut glass for you on the spot.
Plate perfectly matches larger aluminum plates 220x220mm on wanhao duplicator i3 mp maker select anet a8.