Vossloh schwabe 2x  39w 24w T5 or 18w-40w TC-L DIGITAL BALLAST ELECTRONIC 

works with either 2 x 24w 39w T5 bulbs or 18w 24w 39w 40w TC-L

please see the specifications on the pictures

Each ballast is new, they were taken from brand new units that were stripped for parts

It is 36cm x 3cm x 2cm