Offering high-performance flexibility with an average in-and-out movement of 8" to 10", this solution retrofits easily to most 1-1/2" to 2" thick sectional doors, performs reliably in environmental temperatures ranging from 20°F to 131°F (-7°C to 54°C), and delivers an exceptional thermal seal with 1-3/4" insulation for an impressive R-value of 8.5.