Quantity 250 of 

OMNIHIL AC/DC Adapter 12V 1A 1000mA 3.5x1.35 (H Plug) OMH-120-1210U

$8.96/each with free shipping (UPS Ground or compatible)

UL Listed

Comes with 250 removable 5.5mm x 2.5mm Female to 3.5mm x 1.35mm Male DC plugs. 

12V 1A power adapter with 8' cord - DC plug 5.5mm x 2.5mm

5 year warranty

Ships within 1 day if item in stock