Brass Monkey Three. Just two rings engraved on the end of each piece differentiates it from Brass Monkey One (no rings), Brass Monkey Two (one ring) and Brass Monkey Four (a deeper central hole).
This puzzle is a designed by Ali and Steve from the Two Brass Monkeys. It is their second collaborative design. Like the others in the series of puzzles, it weighs almost 800g (1.1 lbs). Each piece is 70mm long and has a diameter of 19mm. This is a puzzler's puzzle. Perfect for fooling those who think they have seen it before. It looks like a standard interlocking Burr. It isn't.
Check out the others in the Brass Monkey Line here.