1,Standard: AREMA BS UIC 2,Material: Carbon steel 3,5 / 8, 3 / 4, 7 / 8, 15/16, 1 " 4.certificate:ISO9001:2008,SGS 5,OEM Jinstar fastener manufactures four sizes of track and boat spikes: 5/8", All spikes are manufactured to latest A.R.E.A. specifications, eitherin low carbon or hi carbon steel. Galvanized upon request.1:Certificate2,Workshop3:Warehouse