Passenger Car Curved Integrated Height-Adjustable Rear Seat Headrest Assembly

This height-adjustable headrest assembly is designed as a direct OEM replacement for passenger car seats. Featuring a sleek, fluidly curved integrated silhouette wrapped in black leather, it conforms naturally to the occipital curvature of the user's head to reduce cervical strain. Equipped with two straight, smooth electroplated metal support posts, it installs directly into factory seat socket holes for reliable height adjustment across sedans, SUVs, and MPVs.

Parameter
Features

Cushion Material	Automotive-grade high-density PUR polyurethane foam.
Foam Density	60 kg/m³; Compression permanent deformation ≤ 9% (Resists collapse over long-term use).
Flame Retardancy Standard	Complies with national standard GB 8410-2018 for automotive interior flame resistance; Low VOC, non-pungent odor.
Optional Core Upgrade	Internal filler upgradable with composite slow-rebound memory foam to enhance head and neck pressure-relief contouring.
Support Notch Rod Material	45# quenched and tempered hollow round steel; Electroplated surface for anti-corrosion protection.
Support Rod Diameter	φ10 mm to φ16 mm (Universal passenger car standard specifications).
Dual Rod Center Distance	Mainstream 140 mm / 160 mm (Precision custom molded per vehicle data).
Adjustment Mechanism	Mechanical up-and-down notched positioning; Side push-button unlock mechanism.
Height Adjustment Travel	Approx. 90 mm travel range across 8 to 10 fixed notched positions; Secure locking prevents slipping or dropping.
Base Material	High-strength modified PP engineering plastic; High impact resistance and shatter-proof durability.

Key Features & Selling Points:
- Fluid Curved Silhouette: Smooth, streamlined profile with continuous curves provides ergonomic contact while matching modern automobile interior aesthetics.
- Ergonomic Head Alignment: Formed to contour naturally against the occipital region, providing supportive cradling during everyday driving or rear-passenger travel.
- Polished Metal Guide Rods: Engineered with dual smooth, corrosion-resistant electroplated metal rods to allow effortless height adjustments and firm locking stability.
- Universal Sedan, SUV & MPV Fitment: Features a standardized plug-and-play stem spacing suitable for original seat upgrades in both front and rear seating rows.