TMS YTX12BS CTX12-BS GTX12-BS UTX12 UTX12-BS YTX12-BS GEL Sealed Maintenance Free ATV Quad Motorcycle Scooter Moped Battery Maintenance-free, no acid water needed, never needs re-filling Advanced lead-calcium technology pumps up starting power Resists shock and vibration Long lasting which means High Performance Maintenance Free batteries will last up to three times longer than conventional batteries. Dimension: 5 7/8" x 3 5/16" x 4 1/8" inches