The plot presents four samples on the horizontal axis with water vapour permeability shown as vertical bars against the left axis in grams per square metre per hour and coefficient of variation shown as points against the right axis in percent. Sample 1 has permeability near 80 and variation near 2. Sample 2 has permeability near 90 and variation near 1. Sample 3 has permeability near 70 and variation near 2.5. Sample 4 has permeability near 75 and variation near 2. Both axes use evenly spaced grid lines.