The spring steel sheet can be bent to remove the mold quickly, without the help of other tools. And the plate return to flatness,no deformation. Spring steel sheet is made of stainless steel, no matter how bent it is, it can return to flatnessThe spring steel sheet is flat and flexible, you just need to put the printing sheet on the magnetic base,the printing sheet automatically attracted to magnetic base, no glue ,no screw, just put and print. Hign-concerned Chemical:None Model Number:184x184MM Item Type:Heat Paper (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:Metal Package Contents: 1 * Build Plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.