Planet US, FH+RD (fire retardant and smoke-shielding), 1210 mm, can be shortened to 1085 mm. Drop-down seal for particularly narrow wooden, metal, and PVC doors. Drop height up to 20 mm. Sound absorption level up to 48 dB with optimal sealing. Deeper recess allows for protection of the silicone lip. Door bottom can be adjusted without seal removal. Unilateral and silent actuation. No scraping or trailing on the floor, thanks to parallel drop. Automatic compensation of sloped floors. Suitable for single and double doors (fits past driving bar rod or flush bolt). High-quality silicone lip, lateral protrusion adjustable. Easy drop height adjustment. Can be shortened to the next smaller stock length. 7-year warranty. Planet assembly set TW/US for wood, including 2 mounting brackets (stainless steel), 4 screws, and stopping plate, type 1 (stainless steel). Automatic door drop-down seal Planet US FH+RD | 48 dB, for sound, smoke-shielding, and fire-retardant doors, hinge-side release with automatic compensation for sloping floors, parallel lowering, seal height up to 20 mm, flush or deeper with lip protection for grooving. Side attachment, lip made of self-extinguishing silicone. Profile made of aluminium 8 x 30 mm.