I have a new Besam sl500 electric lock assembly for sale

I have 2 new fail secure and fail safe electric locks for Besam sl500 sliding doors. Please lmk which you prefer when purchasing.

I have a new Besam sl500 electric lock assembly. One is fail safe and one is fail secure. Please tell me Which you would like after purchase. Thanks

1008167 – Sl500 Fail Secure Solenoid Lock Assy. Condition is New. Shipped with USPS Priority mail.