Post author:OHD Philadelphia Post published:January 30, 2019 Post category:News DuraServ was named the Rytec 2018 largest Volume Dealer in North American for the 9th year. You Might Also Like 2016 Rytec Largest Dealer in North America January 26, 2017 Southern Dock Products/DuraServ – Named in Middle Market 50 List June 20, 2019 Cookson Door Sales of Arizona joins Duraserv May 1, 2018