Feature: 1. 1/0 GA to 4 GA: This is a 0 Gauge to 4 Gauge amp input reducer, accepts oversized 1/0 car audio wire as well as 1/0 and 2/0 welding cable. 2. Wide Application: Car audio amp input reducer has wide applications, applicable to automobiles, boats or other vehicles, practical parts. 3. Function: 1/0 Gauge to 4 Gauge amp input reducer can effectively improve the transmission of sound quality, protect your audio system. 4. Premium Material: Wire reducer adapter is made of 6061 aluminum material, nickel plated, high strength and hardness, rustproof and durable. 5. High Reliability: High accuracy manufacturing technology, amp input adapter has stable performance, convenient to use, plug and play. Specification: Item Type: Amp Input Reducer Material: 6061 Aluminum Interface: 1/0 Gauge to 4 Gauge Application: For cars, boats or other vehicles For Extra Large 1/0 Gauge Car Audio Cable, 1/0 Gauge Soldering Cable and 2/0 Gauge Soldering Cable. Package List: 2 x Amp Input Reducer