KNIGHT Manufacturing is a Canadian company that designs and manufactures cast iron sleeves for the repair of bearing housings in electric motors. We have resellers in the US, The Netherlands and Australia. KNIGHT Sleeves provide a cost efficient and reliable repair for bearing housings. The design ensures the ease of wear on tooling with a smooth finish and only 1mm to machine off the Inside Diameter. Each sleeve that is made is checked for quality of the highest standard. They must be perfectly round, or they are not sent to the customer. See the difference a KNIGHT can make by contacting us. 8AM - 4PM EST Monday to Friday (Excluding holidays) at 866-400-0575, or by email any time at hello@knightsleeves.com. We look forward to meeting you!