Excellent Contact: The contacts of the plug adapter are made of high-quality copper, which has excellent electrical conductivity and can withstand high temperatures, low temperatures and other extreme weather conditions. It will not fail even in humid environments. Practical Performance: High efficiency copper wire, including connector set, sturdy, efficient, heat resistant, never melts. For repairing or replacing burnt out headlight adapters. These connectors are used on many vehicles. Compatibility: Compatible with H11 H8 H9 and 880,881,890, 886, 889, 892, 893, PG13, PGJ13, 880, 890, 862, 881, 884, 885, 894, 898, 899 etc. bulbs. Widely used for 12V or 24V headlights, fog lights or other modifications. Easy to Use: Rest assured that its installation does not require any modification to your original circuit. Plug and play, very easy and fast.