Thanks for your inquiry.
My name is Tanit Jongsavutsoontorn from PBA Systems (Thailand) CO.,LTD. Who is authorize distributor of Ringspann in Thailand.
I get your inquiry from Ringspann.
FXM 100 - SOSX/H 55 W 56 13 ST
But the part number which you ask maybe wrong.
I attach the specification of backstop FXM series for your reference.
Please check your part number again.
If you have any question, please let me know.