2200C Ultra-High Heat Resistance: High-temperature resistance is four times higher than synthetic stone (300C) and over 200C higher than silicone, without thermal deformation. Near-zero coefficient of thermal expansion: 0.000001/C CTE, 50 times more stable than synthetic stone and three times more stable than silicone, eliminating micro-layer shifting in printers with 0.01mm . Ultra-low thermal conductivity (2 W/): Compared to silicone (150 W/), it blocks over 98% of heat leakage, significantly reducing motor temperatures. Industrial-grade durability: Our ceramic blocks are up to 1200 MPa strong (four times higher than synthetic stone and two times higher than silicone), capable of withstanding accidental drops and carbon fiber abrasion. Laboratory-tested, they have a hardness of HV1200. Compatible with: A1 and H2D 3D printers Color: White Material: Ceramics Package Contents: 2*Ceramic Zirconia Block for H2D 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.