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    Gates manufactures caps, thermostats, adaptors, and testers for accurate, reliable service to your heavy duty construction machinery and vehicle equipment. We develop our radiator, oil, and fuel caps and thermostats with the leading product development technologies, and work to construct every construction solution using the industry’s most advanced material science capabilities. You can trust your Gates caps and thermostats for an OE quality fit to your equipment, ensuring leak-free attachment, adaptors that service a range of equipment applications, and precise pressure and temperature measurements for simple equipment assessments.