PREMIUM AGM TECHNOLOGY: Utilises advanced AGM technology pre filled and ready to go! SUPERIOR RESISTANCE TO VIBRATION & CORROSION: Engineered for enhanced durability with exceptional resistance to vibration and corrosion NO TOP-UP IS REQUIRED IT IS MANTENANCE FREE - FOREVER Dimensions:151mm Long (along front) x 70mm Wide x 131mm High 12Volt, 10AH. Positive terminal on LEFT (with terminal nearest you) Replaces: GT12B-4, GT12B-B4, YT12B-BS, CT12B-4, ET12-B4, YT12B-4, YT12B-BS, ET12B-4, FT12-12B,