All ULTRAMAX TT series "Liquifix" batteries use AGM technology which consists of an Absorbent Glass-fibre Matting between the lead plates inside the battery. Replaces the following numbers: YT4L-BS, YTX4L-BS, CTX4L-BS, GT4L-BS, GTZ5S-BS, YTZ5S-BS, 503-014-003.
eBay