... spindle 4.Water cooling system 5.Square guide rail Heavy Duty Stone CNC Router 5.5KW Spindle ZK-1325 1300* ... , artifical stone, tombstone, milestone, ceramic tile, jade, crystal, ceramics, glass, plastic, wood, bamboo, cambered surface, sphere, stainless steel, iron, ... artistic effect .5.Also can for woodworking/metal/advertising/glass materials processing.Machine features 1. Linear square guide rail ...