Rhombus Concrete is the leading supplier of ready mix concrete in Kenya; with 4 batching plants, 24 fleet, and an experienced technical team. Skip to content. Call Us +254-702-700-700 / +254-705-900-000. ... CRJE East Africa. Nairobi Hospital. Rokoh Construction. Vanzi Engineering. Pinnie Agency. Our Clients. Kenya Railways Corporation . China ...