Technical data Color Black Features Resistant to ageing (durable), alkali-resistant, flame-retardant, acid-resistant, weather-resistant (UV / ozone-resistant), oil-resistant Hardness Very soft (up to 30° Shore A) Temperature resistance -40°C to +100°C Self-adhesive Self-adhesive Material NBR cellular rubber Compatibility All 6.5″ / 165 mm HELIX COMPOSE speakers Scope of delivery 5 pairs acoustic foam rings