These 3D printed stretcher bars are made with a hard durable outer plastic and have an inner well of soft pliable plastic that is easy to push the tacks through.  The inner well plastic slides out and can be replaced if needed.  These 3D printed stretcher bars can be used again and again for many years to come. 

 Buy two sets to form the exact size frame desired.  

• Width .75" X .5"
• Sold in packs of two
• Length is 3D printed on the bottom side opposite where the tacks are inserted.