Planet FT-plus, FH+RD (fire-retardant and smoke-shielding), 1050 mm, can be shortened to 950 mm. Drop-down seal for wooden, metal, and PVC doors. Drop height up to 22 mm. Acoustic insulation value of 55 dB with optimum sealing. Unilateral and silent actuation. No scraping or trailing on the floor, thanks to parallel drop. Automatic compensation for sloped floors. One groove size for Planet FT and RF (uneven floors). Also suitable for double doors with flush bolt or shoot bolt. Compatible with Planet Socle. High-quality silicone lip, lateral protrusion adjustable. Easy drop height adjustment. Can be shortened to the next smaller stock length. 7-year warranty. Planet stopping plate, type 1 (stainless steel). Automatic door drop-down seal Planet FT-plus FH+RD | 55 dB, for sound, smoke-shielding, and fire-retardant doors, hinge-side triggering with automatic compensation for sloping floors, parallel lowering, seal height up to 22 mm, flush for grooving. Fixing from below, lip made of self-extinguishing silicone. Profile made of aluminium 13 x 30 mm.