If you are using rails mostly for lens support in combination with lens supporting brackets this two rails should make you very happy. They are as light as I can make them. All extra material has been machined out, but that does not compromise on rail strength. They do also have scale engrave for references. I decided not to included bubble level on this series. This always increase weight . If you need level please look for G014 rail series in my store.
G011-10 rail - 10 inch long - Weight 5.1 oz (146g).