A Comparison of Feline Design parts vs.
Armarkat Parts

 comparison of Armarkat (left) and Feline Design components

On the left: Cross section of Armarkat tube, removed from a multi-level cat tree.

Tube walls: 1/4"
Rope diameter: 1/4"
Plastic Plug walls : 1/8"
Stapled in hard plastic.
Outside diameter: approx 3 .5"

On the right: Cross section and display of Feline Design components.
Tube walls: approx. 3/8"**
Rope diameter: approx 3/8"
Pine Plug depth: 1.5"
Outside diameter: 
over 4.5" **On shorter posts without top platforms or perches,
a narrower wall may be used.