Everything you need to mark mandrel-bent tubing in one kit. You get the Mandrel Marking Tool (angle slots for cut marks), the matching Mandrel Marking Collar (360° layout and fine-tune along the CLR), and two Long Neck Markers that drop into the tool. Pick your tube OD and centerline radius — each kit fits one size. Built in our veteran-owned fab shop in Ocala, FL. Kit price is about 10% less than buying the three pieces separate. Color of markers: tell us at checkout or we’ll pick. Not for straight tube. Questions? Email Fullpenetrationwelding@yahoo.com or Instagram @fullpenfab.