Standard or non-standard bushing/sleeve/bearing, tailor-made parts according to the customers'drawings or samples. 
Materials include: 
-Silicon Carbide (SSIC & SiCRB) 
-Tungsten Carbide (6% Nickel TC & 6% Cobalt TC) 
-Carbon Graphite (resin-impregnated & metal-inpregnated) 
-Aluminium oxide ceramic, etc.