White, impact resistant steel tape measure has 16 mm blade width, graduated in millimetres with an ABS plastic case. Combined marking and measurement edges mean that you can quickly and simply measure and mark both internal and external lengths. The tape and extender can be replaced and are available as spare parts. Measure is ideal for both internal and external measurement using etching function. Diameter measurement with scale on the reverse side of the tape. The Talmeter has a calliper function that is handy to mark out round shapes. The scale is always locked in normal position. The extender is easy to extend and retract using the grip-friendly sliding carriage. In the Talmeter 3M VP (359403), the millimeter and the diameter scale are on the same side of the tape.