Assortment corresponds to GOST 8509-93. Precision classes: A - high precision; B - ordinary precision. The number of equal flange steel corresponds to flange width, expressed in mm. For example: Angle 25 -flange width 25mm. All other sizes (wall thickness and etc.) according to GOST (shown in the table of GOST book of reference).
Musical Instrument, Electronics, Graphics Cards, Watercraft, Outboard Boat Engine, Atv, Scooter, Motorcycle, Pellet Stove, Fireplaces.