Our machined buss bars are desgined around XS Power D3400, D3400R, D1400, D1600, S3400, S1600 and the lithium 15k. These give you the option to be able to add and subtrack batteries as you need with out needing to rebuild new buss bars. Also giving you muliple inputs/outputs for your power and ground. 
This listing is to be used with the buss bar caps (at the link below). This item is for using 2 batteries or however many batteries as you need and can fit in a row. 
This item is sold as a Pair
http://skyhighcaraudio.com/sky-high-car-audio-buss-bars-group-34/