These ones are low with a squarish profile but quite small so are nice and light weight for modern boards.
They are just like most of the other rails available today (Santa Cruz, Powell, OJ, Creature, Pig, etc.) except these come backed with 3M self adhesive foam. This little addition makes them far easier to fit and if you ever lose a screw (or get one work loose) then you want be annoyed by "rail rattle". Such a simple little thing but all the best ideas/improvements usually are.