Aroundsquare's Hydra Begleri are a fun yet highly capable modern adaptation of the traditional Greek multi-bead begleri. All of the Hydra sets have multiple interchangeable beads, allowing for interesting colour combinations, and some customization of weight.
The titanium version comes with four beads, precision-machined from grade 5 titanium, weighing in at around 7g per bead, for a total of around 28g per set. The beads themselves are 16mm in diameter and 8mm thick, making for a 16x16mm stack at either end.
The titanium Hydras come with several extra strings, a fist full of stickers, a canvas carry bag, an info card, and a slick little gift box.