This ballast is suitable for the XClear/AquaForte UV-C unit of 40/80 watts with amalgam. This separately available ballast is a replacement part. With the purchase of this ballast you avoid power fluctuations, which results in long-term protection of the UV lamp. • Ballast for 40/80 watt amalgam • Length when installed is 65.4 cm incl. lamp. • Attention: white connection! • Note: Supplied without plug!