Quick overview from the supplier:
Baterie UPS 12V/ 18AH Tuncmatik TBS (same as 12V/ 17AH)
Nomnal Voltage: 12V
Nomnal Capacty (20HR): 18.0AH
Dmension
Length 181.5+/-2mm (7.14 inches )
Wdth 77+/-1mm (3.03 inches )
Container Heght 167.5+/-2mm (6.59 inches)
Total Heght (wth Termnal) 167.5+/-2mm (6.59 inches)
Weght: Approx 5.32kg (11.73lbs)