Summitglow Ltd www.summitglow.co.uk +44 0114 270 1866 45 Harleston Street, Sheffield S4 7QB, UK Summitglow Ltd www.summitglow.co.uk +44 0114 270 1866 45 Harleston Street, Sheffield S4 7QB, UK Heat Treatment Specialists is a family owned company which was established in 1983, as such we have over 30 years’ experience and expertise in thermally processing a vast range of materials by a wide range of processes. Contact Us Contact Us Latest News