HD6016B is our spec. of mobilon clear elastic in width of 1/4 inch. The TPU tape is made from Taiwan TPU raw material and processed with tiny dull polish grain. HD6016B is a common size of tape. Compared with D Series and S Series TPU tape, B Series tape has flat surface and matte appearance refers to the raw material and dull polish grain. We usually recommend B Series for customers who need certificates while has less demand on quality and performance of TPU tape.