ShapesbyX 3 Pieces Stainless Steel Black/Gold Silicon Watch Band Tubes Slider for Bracelet Making 10mmx3mm Inner Hole

Stainless steel curved tubes for bracelet making.
10x3mm inner hole, for flat leather 10x2mm, you can use following leather:
40mm long with 12mm wide outside.
You choose from the colors

Suitable clasps and leather band, you can use following 2 links:

https://shapesbyx.com/collections/flat-leather-strip-10mm-wide

https://shapesbyx.com/collections/stainless-steel-clasps/products/pack-3-stainless-steel-silicon-band-watch-band-claw-clasp-end-hold-10x2mm-10x3mm-leather-strips-10mm-snap-closure-%E7%9A%84%E5%89%AF%E6%9C%AC