N52 >N40>N35. However,if add a steel cup, the other pole of the magnet to be used which increases the strength of the magnet to much higher than that of a normal neodymium magnet but also makes the other side magnetically weak.
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15*15cm 40Pcs Soft Felt Fabric Sheet Assorted Color Patchwork Sewing DIY Craft Squares Nonwoven 1mm Thick Handmade Cloth Weaving
Aliexpress UK
No fading, peeling, or wear. STRONG MAGNETIC HOLD: Each magnet sheet stays firmly attached to any magnetic surface, so no slipping, sliding, or weak spots. Your prints stay put, exactly where you want them!
eBay
20/40Pcs Nonwoven Needlework Felt Fabric DIY Quilting Sheet Patchwork Cloth Bundle for Kids Scrapbooking Doll Sewing Crafts
Aliexpress UK
The Magnetic Sheet are Easy Cutting to any size. Perfect for DIY Cut, Make anything magnet easily. Flexible, Adhesive,Printable Magnet Sheets. Strong Magnet And easy magnet to Any Iron. Non-toxic, odorless, highly transparent, not easy to break bag leak, play a very good anti-pollution.
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125mm Flap Discs Sanding Disc 5 Inch Grinding Wheel For Angle Grinder Cast Iron Metal Sheet Surface Polishing 1-5pcs Grit 60#
Aliexpress UK
No fading, peeling, or wear. STRONG MAGNETIC HOLD: Each magnet sheet stays firmly attached to any magnetic surface, so no slipping, sliding, or weak spots. Your prints stay put, exactly where you want them!
eBay
PeriPage Mini A4 Printers Quick Dry and Long Time Storage Continuous Thermal Paper 100 Sheets Folded Thermal Paper Papel
Aliexpress UK
The strong magnetic backing prevents the planner from slipping or sliding out of place. Plus, the planner is made from recyclable materials, supporting eco-conscious living. Keep both work and personal priorities visible and within reach.
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80 Sheets Flower Wrapping Paper Waterproof Floral Bouquet Wrapping Paper for Wedding Birthday Gift DIY
Aliexpress UK
Self adhesive 6x8 inch magnet sheet, 0.5mm thick. Great for photo magnets for fridge, very popular. (4 PACK) enter 1 in quantity for 4 pack.
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8 Sheet Vintage Newspaper Decorative Craft Paper Junk Journal Ephemera Retro DIY Album Diary Scrapbooking Material Paper Pack
Aliexpress UK
No fading, peeling, or wear. STRONG MAGNETIC HOLD: Each magnet sheet stays firmly attached to any magnetic surface, so no slipping, sliding, or weak spots. Your prints stay put, exactly where you want them!
eBay
30 Sheets/Set Showa News Japanese Style Postcard Retro Cartoon Characters Greeting Cards Message Card Birthday Gift Card
Aliexpress UK
No fading, peeling, or wear. STRONG MAGNETIC HOLD: Each magnet sheet stays firmly attached to any magnetic surface, so no slipping, sliding, or weak spots. Your prints stay put, exactly where you want them!
eBay
30 Sheets/LOT Van Gogh Postcard Vintage Van Gogh Paintings Greeting Card/Wish Card/Fashion Gift
Aliexpress UK