ARROW MODEL DOUBLE WING SLIDE MECHANISM COMPLEMENTARY PARTS OF THE MECHANISM 1 Piece 160-300 cm long steel rail 4 Pieces of steel bearing suspension pulley 4 Pieces Cover Side Stopper Stop steel 4 Pieces Door Top Stabilizer Steel 2 Pieces Door Bottom Fixing Guide 8 pieces m8*55 bolts 5 pieces of Steel Wall-Door Distance Adjustment 5 pieces of M8*100 Steel Triphone Mounting Screws 5 dowels All steel parts have been given static oven paint against rust. -DOOR IS NOT INCLUDED IN THE PRICE- 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 50 CM, 200 CM RAIL; IF THE SINGLE WING WIDTH IS 55 CM, 220 CM RAIL WILL BE ENOUGH. AFTER SELECTING THE RAIL LENGTH, YOU NEED TO SELECT THE AREA (WOOD-WALL) WHERE THE DOOR WILL BE MOUNTED. IF THE SINGLE WING WIDTH IS 60 CM AND ABOVE; YOU SHOULD ORDER THE DOUBLE DOOR (SINGLE RAIL DOUBLE WING 240-300CM) MODEL OF THE SAME PRODUCT. IF THE SINGLE WING WIDTH IS 80 CM AND ABOVE; YOU NEED TO ORDER TWO PIECES OF THE SINGLE DOOR (160-200 CM) 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.