RBA stern tube bearings offers 3 standard material as follow:
1. Metallic stern tube bearings
Backing material : Brass/bronze/stainless steel 304, 316, 316L/duplex/Inconel
Lining material : NBR 70, 90/ Viton /Polyurethane
2. Non-Metallic stern tube bearings
Backing material : Phenolic paper based/ Glass filled composite
Lining material : NBR 70, 90/ Viton /Polyurethane
3. Full Non-Metallic stern tube bearings
It is made from one full non metallic composite material.