Xentec Alloy Advanced Slim Ballast Ballast: 35w Alloy Slim Ballast: Super bright 3100 lumen performance, reduced flickering with non-cycling technology, Six-Sigma quality manufacture Water, shock, and rumble resistance, Six-Sigma Quality Assurance Testing compatible with any type of 35W xentec hid bulb AMP compatible product include: 1 of xentec alloy slim replacement ballast