If you want to make your printing platform flat enough, stuff is glass sheet. Lattice glass is rated for higher temperatures than normal sheet glass making it a better material for use as a heated bed. After cracking a few sheets of normal glass from rapidly cooling or heating, lattice glass will quell your frustrations. Features - Color: Black. - Material: Lattice glass. - Size: 30.00X20.00X0.40cm/11.79X7.86X0.16in. - When start printing, make the printed object not easy to wrap up - When finished printing, could let user easy to remove the printed objects - Could be apply to heating PCB directly, could start printing at once,don't need to stick any tape or glues,when leveled, replace most platform plate in the market . - Anti-scratch, high hardness,not easy to be broken,surface flatness is no more than 0.19mm. - Resistant to thermal shake compared to regular glass. Package list: 1 bed platform film