The 4" Weatherwood liner insert fits a common 2x4 so has an actual height of 3.5 inches. 

Very versatile.  Use them for edges of patios and drives, bold countertop edges, seatwall caps, firepits, and more.

• 6.5' long.
• Approximately 3/8" in thickness so they are easy to accommodate in your formwork.
• Rich linear grain from end to end.  
• Lightly caulk or tack to outer form.
• Reuse many, many times.
• 3 lbs each.
• Can be almost seamless when run end to end or strike a line for distinction between the two.