Karcher design Verona Steel Door Handles

Brand new, still in boxes. 7 boxes. 25 each or 7 set for 150. Karcher Design "Verona" Lever Handle on Round Rose (Model: ER37 OS 71) finished in satin stainless steel.
This box contains a set of Karcher Design "Verona" (ER37 OS 71) door handles finished in satin stainless steel.
The "OS" label indicates "Ohne Schlüsselros." / "Without Escutcheons," meaning this specific pack only contains the pair of lever handles and their integrated mounting roses. It does not come with matching keyhole covers or lock mechanisms.
Depending on your door type, you will need the following separate components to complete the installation:

1. Keyhole Covers (Escutcheons)

Since the handles don't cover a lock hole, you will need separate matching satin stainless steel (Color 71) roses if your door requires locking or privacy:
• Standard Keyholes (BB): For typical interior skeleton-key locks.
• Euro Profile Cylinder (PZ): For modern cylinder security locks.
• Turn & Release (WC/Bathroom): A thumb-turn system for bathroom privacy.

2. Internal Door Lock/Latch Mechanism

The handles operate the latch, but the internal mechanical box inside the door must be purchased separately:
• Standard Tubular Latch: If the door just needs to shut without locking.
• Sashlock: If the door requires a physical key to lock.
• Bathroom Lock: If installing a thumb-turn