... many length ,10m,20m,30m,50m,100m 3.Environmental protection. Long steel Ruler, measuring tape1). This Measuring tape is use high quality steel belt ... and plastic material 2). Advantages: The steel measuring tape has accurate scale, clear, durable feet straight with strong, ... have a variety of specifications for choice. 3). Steel measuring tape available: 20 m 30 m and 50 m, 100 m ...