Marble and granite blocks of equal height, also known as blocks of equal height, are used for measuring the parallelism of parts. They are generally supplied in sets, with the quantity per set customizable according to the customer's design requirements.

Marble and granite parallel blocks, also known as parallel blocks, are used for measuring part parallelism. Typically supplied in sets, the quantity per set can be produced according to the customer's design specifications. The precision requirement for marble parallel blocks is generally 2 sides parallel and perpendicular, but can also be 4 sides parallel and perpendicular as per the customer's design requirements.

Marble high blocks are supplied in sets, with each set containing 2, 3, or 4 blocks.

Marble and high-grade block materials: "Jinan Green" marble, granite.

Polished marble blocks and similar high-quality materials: machined for material selection, then hand-finished by technicians.

Advantages of high-grade marble blocks: black luster, fine structure, even texture, good stability, high strength, high hardness, non-rusting, non-magnetic, non-deforming, and excellent wear resistance.

Characteristics of high blocks of marble:

1. Rock has been aged over a long period, resulting in a uniform tissue structure, an extremely low expansion coefficient, the disappearance of internal stresses, and no deformation. Therefore, it boasts high precision.

2. High rigidity, hardness, and wear resistance.

3. Resistant to acidic and alkaline substances erosion, non-corrosive, no need for oiling, easy to keep dust-free, simple maintenance and care, and long service life.

4. No scratching, unaffected by controlled temperature conditions, and maintains temperature measurement accuracy at room temperature.

5. Non-magnetizable, smooth movement during measurement without stickiness, unaffected by humidity, and flatly calibrated.