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This is a patented design known as: Pre-measured Pipes. The design is useful to many. It has received positive responses from people who have heard of the design. The design is very simple and yet saves so much valuable time. No tape measures or markers needed. No more making inaccurate cuts. Pre-measured pipes have the measured printing on them already for you to make your job easier. Pre-measured pipes are for any pipe, even those tough to measure coil pipes!
This design is patented by Brian Memetaj. If you are interested check out his website at:
Or check out the video demonstration on YouTube by searching for his his channel: Premeasuredpipes
Be sure to check these out especially if you are interested in discussing a way to produce the Pre-Measured Pipes method.
Source link: http://www.pre-measuredpipes.com/