Two types of bobbin are available for the Janome HD9, this is the version 1 metal spool 24mm x 9mm depth
Janome America: World's Easiest Sewing, Quilting, Embroidery Machines & Sergers
Janome Bobbin Case #767595005 - HD9 V2 (Version 2) Sewing Machine
BOBBINS
For Jumbo Bobbins 767860107 For JANOME HD9 (Version 2), HD9BE Sewing Machines 100Pc Durable - AliExpress
Janome HD9 V1 Metal Bobbins - Sold Per Bobbin - #770591001
Genuine Janome, High Capacity Metal bobbin specifically for the Janome HD9 Sewing machines NOTE: Orderfor the Version 1 HD machines there is no part
Janome Bobbins for model HD9
Bobbins – Tom's Sewing
Product Review: New Jumbo Bobbins for the HD9 V2 - Learn with Janome
Janome Bobbins
Janome HD9 High Speed Sewing Quilting Machine
Janome HD9 V2 Quilting & Sewing Machine - 1,600 SPM – Sewing Machines UK
Janome HD9-V1 Jumbo Metal Bobbin - Red Deer Sewing Centre