This is a set of HO gauge curved rails and straight rails with electrical connection terminals. - Type: HO gauge - Quantity: Curved rails: 16 Straight rails: 2 (1 of which has electrical connection terminals) Thank you for viewing. These are old items that I used when I was a child, but I have tested their operation after connecting them all (see photo 4). They are old, so please understand that some parts may have weak electrical conductivity. Also, since there are not enough rails to complete a full connection, I will include a pair of point rails (left and right) as a bonus. (See photos 5 and 6). Thank you.