1/10 Yokomo RD/YD Series R Diffuser for 2 Types (3D Printer, PLA) The layering marks are made to be on the back side. Due to some changes, it is composed of 2 types. Please choose one you like and let me know? Type 1 Normal Model (Based on the previous model, the weight reduction has been removed for strength priority.) Type 2 Unique Model (For those who like something different from others.) There are layering marks and burrs unique to 3D printers. If you are concerned, please adjust with sandpaper. Please ask if you have any questions. #RD2.0 #RD1.0 #YD-2