SIEMENS筆7ND9001-8AA,紅色,適用于7ND2122/7ND2124/7ND2125/7ND2160/7ND2161/7ND3120 SIEMENS筆7ND9001-8AB,藍色,適用于7ND2122/7ND2124/7ND2125/7ND2160/7ND2161/7ND3120 SIEMENS記錄筆7ND9001-8AC,綠色,適用于7ND2122/7ND2124/