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Innovative designs are becoming smaller and smaller, and as a result, the market demand for miniature components is growing. Hence, our team has accepted the challenge to develop the world's smallest o-ring! We specialize in extremely tiny o-rings and custom

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They were one of 60 companies. For details, click below. http://sciencelinks.jp/content/view/1296/287/

KEF succeeds in manufacturing a "flash free" and "no parting Line" O-ring. We develop products, where there can be no debris, e.g. for medical, where mold part lines and burrs have become problems. Functionally, this will provide your products superior

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This requires strict industry standards and that each part will meet or exceed those standards, time after time. Making material with high precision and high reliability is a critical issue. It is also critical in our O-rings.

This was no easy task. Diaphragm thickness and diameter are 0.025"±0.004 and 2.840" respectively with nylon cloth inside.　 The three-layer structure is created by compression molding on both sides of a nylon cloth with special rubber that we have developed.

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Accuracy and reliability are important for use in space. This watch seal's specifications are waterproof up to 1000 meter deep and must withstand temperatures of -20°C~+70°C. A product is developed using our newest raw material compound, proving high quality and

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KEF was chosen among 300 other companies for Fine Manufacturer in Japan. KEF receives a letter of thanks from the Japanese economic minister.