These plastic bobbins are used on most new Singer sewing machines. They are 15k class and suitable for front loading or top loading sewing machines.
Plastic sewing machine bobbins - Bernette
Sewing Machine Bobbins
Singer 15k Parts - UK
Singer MULTI2134-3 Bobbins, 3-Pack, Transparent, 3 Count
Janome Horizon Memory Craft 15000 Sewing Machine Parts
12 pcs Bobbins class 15 – Gkstitches
Tone Kraft Mustang Style Pickup Bobbin Kit
Milward Universal Class 15k Metal Bobbins 3 Pack
Singer 15k Parts - UK
Brother Innovis A Series Extension Table Fits Innovis A50, A60, A65, A80, A150 - UK