Replacement CD stabilizer puck designed for Sony CDP-XB920 and CDP-XB930 CD players. The 3D printed puck will not be as heavy as the original one. But it will work in the player which will recognize it as if you've inserted the original stabilizer. Directions Additional materials: Get 3 stainless steel washers (5mm hole, 15mm diameter) It's important they can be held by the magnetic top of the spindle. Make sure the washer almost fits. Hammer those three washers into the center of the printed puck. They will fit in very tightly Only printed parts, hardware NOT included.