CAST IRON PULLEY MODEL DOUBLE DOOR SLIDING MECHANISM COMPLEMENTARY PARTS OF THE MECHANISM 1 Piece of Wall Rail in Desired Size Between 160 cm - 300 cm 4 Pieces Double Bearing Casting Reel Hanger 8 Pieces m8*45 Bolt 4 Pieces Door Side Stopper Stopper 4 Pieces Door Upper Lock 2 Pieces of Door Bottom Guide 9 Pieces of Wall Rail Distance Wedges 9 Pieces M8*90 Wall Mounting Screws All Steel Parts Are Black Coated Against Rust NOTE 1 : IT IS NOT POSSIBLE TO COMPLETE THE ORDER WITHOUT SELECTING THE RAIL LENGTH. FOR THOSE WHO DON'T KNOW HOW TO SELECT THE RAIL LENGTH; 4 TIMES THE WIDTH OF THE DOOR IS TAKEN AS A BASIS. FOR EXAMPLE, IF THE SINGLE WING WIDTH IS 60 CM, 240 CM RAIL; IF THE SINGLE WING WIDTH IS 75 CM, 30 0 CM RAIL WILL BE ENOUGH. IF THE DOOR WIDTH IS 80 CM AND ABOVE; YOU NEED TO ORDER TWO PIECES OF THE SINGLE DOOR MODEL OF THE MODEL YOU LIKE. NOTE 2: When purchasing retarder stoppers, you should consider the following: For example, for a double door mechanism, when 2 pieces are selected, you can install the retarder system in the areas where your door closes (in the middle of the rail) or in the areas where it opens (at both ends of the rail); when 4 pieces are selected, you can use it in both directions of your door - both in the opening and closing areas.