Planet FT-plus, FH+RD (fire and smoke tight), 950 mm, can be shortened to 850 mm. Drop seal for wooden, metal, and PVC doors. Drop height up to 22 mm. Acoustic insulation value of 55 dB with optimal sealing. One-sided and noiseless operation. No scraping or dragging on the floor, thanks to parallel lowering. Automatic adjustment to sloped floors. One groove size for Planet FT and RF (uneven floors). Also suitable for double doors with whisper or bolt locks. Compatible with Planet Socle. High-quality silicone lip, adjustable lateral overhang. Easy adjustment of drop height. Can be shortened to the next smaller stock length. 7-year warranty. Planet stop plate, type 1 (stainless steel). Automatic door drop seal Planet FT-plus FH+RD | 55 dB, for soundproof, smoke-tight, and fire protection doors, hinge-side activation with automatic adjustment to sloped floors, parallel lowering, seal height up to 22 mm, flush for groove milling. Bottom mounting, lip made of self-extinguishing silicone. Profile made of aluminum 13 x 30 mm.