Two types of bobbin are available for the Janome HD9, this is the version 1 metal spool 24mm x 9mm depth
Metal Bobbin Case Version 2 for the Janome HD9 models to fit the Large Jumbo Metal Bobbin Version 2 which holds 40% more thread than L sized bobbins.
Metal Bobbin Case HD9 V2
Janome HD9 Professional Sewing and Quilting Machine – Quality Sewing & Vacuum
Jumbo Bobbins,767860107,Janome
Janome HD9 V1 Metal Bobbins - Sold Per Bobbin - #770591001
Janome America: World's Easiest Sewing, Quilting, Embroidery Machines & Sergers
Janome HD9 Sewing Machine
Janome Metal Bobbin, Exclusively for Janome HD9 VERSION 2, Part Number: 767 860 107, Need to know which version you have? Check you machine
Janome Bobbins for the HD9 (Version 2)
Jumbo Bobbins #767860107 FOR JANOME HD9 (version 2), HD9BE Sewing Machines - AliExpress
Janome HD9 Professional Sewing Machine - Long Arm sewing machine from Janome
Jumbo Bobbins,767860107,Janome
Bobbins / Bobbin Threads for Janome HD5000 Heavy Duty Sewing Machine - FREE Shipping over $49.99 - Pocono Sew & Vac
Janome HD9 bobbin case problems