The adjustable thermal-magnetic trip covers 875 to 1750 A, and the FFUL/CSA designation indicates UL and CSA certifications — the breaker is accepted in North American and Canadian installations without additional approvals work.
The description reads: XT4H 250 TMA 175 875-1750 3P FFUL/CSA. The frame is an XT4H rated 250 A continuous; the TMA 175 trip unit is adjustable from 875 to 1750 A. The 3P confirms three poles. FFUL/CSA means the breaker carries both UL and CSA marks.