On - Spring's main products are mostly for building / construction fasteners and materials : such as : ** Spring - Seal (TM) pipe flashings & Zip - Seal (TM) retrofit pipe flashings. ** Roofing washers, metal, rubber (EPDM or Neoprene, Silicone,...) , plastic,.. new and advanced materials, composite materials or assembled items. ** Building screws, SDS, STS, window screws,.. carbon steel & stainless steel, ** Helical (twisted) bars. ** Screws + washers assembly. ** Small packing : polybags, boxes, with BAR-CODE,... ** Rubber or plastic moulded head screws/ bolts / nuts, washers,.. ** Tools : bits, hex sockets, high quality and competitive price. The company was founded in 1,990 and we are ISO-9001-2008 certified. Welcome to send us any inquiries with drawings or samples. we're glad to provide our best price to you, even in small quantity.