Hunprenco Precision Engineering Ltd has been a key supplier to the glass container industry for over 40 years. This family-run business, situated on the north east coast of the UK, has worked closely with customers throughout the world to develop materials and production methods to assist the industry in its efforts to realise increased efficiency, reduced downtime and improved, environmentally-friendly, quality products. In order to sustain its position as a leading supplier of plungers and coolers to the glass industry, Hunprenco is constantly looking to improve and develop different materials and techniques. For the last few years, together with a coating supplier, the firm has been developing a worldwide patented coating alternative. The HTC61C coating provides longer plunger life, with no negative effect on performance at high working temperatures.