Retractable door seal, Schall-Ex® Ultra, Athmer. Product details Installation dim. Groove: 20 x 30 mm Mounting For DIN left and DIN right hand use For door type Front door, Wet room doors Product Type Retractable door seal Mounting For DIN left and DIN right hand use Protective suitability for sound absorbing doors in compliance with DIN 4109, for smoke control doors in compliance with EN 1634-3, For fire resistant doors in compliance with EN 1634-1 Sound proofing value 51 dB with 7 mm floor gap Sealing height max. 12.0 mm Length trimming from 708 mm by ≤125 mm