We have good experience over 30 years in this field. We sell our goods to all over the world without any quality problem and our products are guaranteed to be free of porosity & imperfections. You will find below our standard processes & testing methods before delivery; * Chemical Analyze * Dimension Control * Hardness Test * Ultrasonic Test * Penetration Test * Physical Analyze (if required) TRONA is the candidate about leading Hard Bronze and High Coppers in all over the world. By supporting our quality with just in time deliveries we'll become the main supplier of many industries. We can answer all of our customers' requirements easily by our high production capacity. We significantly increased the level of our product and service quality. Especially, we invest on our production line and carried our product and service quality to the upper level. We gave importance to R & D and the product quality. What makes us special? * Long Life and High Technologic Materials * Quick Delivery Time * A good correlation of high quality and suitable prices * Rough machining with 2mm tolerances to the final dimensions * Final machining possibility * Both sides working surface quality (if required) * Forged material for longer life time (if required) * Many items from one shop: hard bronzes and its final machining, welding wheels, welding jigs, bronze bushings for the presses etc