The Lifeline GPL-6CT is a 6V 300Ah (C/20) AGM battery.
Dimensions are 10.22”L x 6.95”W x 12.65”H and 90lbs (260mm x 177mm x 322mm and 40.8 kg)
Lifeline AGM batteries are among the best lead acid batteries available.
They are manufactured in California by Concorde Battery. When you choose Lifeline, you get high quality construction designed to last many years in deep cycle usage.