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The 16 best-selling diameter on AliExpress

We picked 16 diameter from AliExpress with real orders and good reviews. Prices go from $0.14 to $42.64, the average rating is 4.8 stars and the most popular one has 9.6k orders. Every product opens on AliExpress, where you pay with buyer protection.

Updated: 2026-11

  1. 13mm-20mm Diameter 8mm Shank Straight Bit Tungsten Carbide Single Double Flute Router Bit W-54%3mm-20mm Diameter 8mm Shank Straight Bit Tungsten Carbide Single Double Flute Router Bit Wood$0.92 $1.98★ 4.8 · 9.6k soldView on AliExpress →
  2. 2UV/IR650 filter diameter 4.0/4.5/5mm CCTV Lens M12 filter optical filter color glass throuUV/IR650 filter diameter 4.0/4.5/5mm CCTV Lens M12 filter optical filter color glass throu$0.14★ 4.8 · 3k soldView on AliExpress →
  3. 3BB T Slot Milling Cutter for Metal HSS Woodruff Key Seat Router Bit Thickness 1-12mm Diame-81%BB T Slot Milling Cutter for Metal HSS Woodruff Key Seat Router Bit Thickness 1-12mm Diameter 8-50mm$0.92 $4.96★ 4.9 · 2.9k soldView on AliExpress →
  4. 4PLA Filament Diameter 1.75mm Color 3D Printing Material for 3D Pen, 10/20/30 Colors, 100M -77%PLA Filament Diameter 1.75mm Color 3D Printing Material for 3D Pen, 10/20/30 Colors, 100M 150M$1.20 $5.23★ 4.8 · 2.5k soldView on AliExpress →
  5. 5EasyThreed 3D Printing PLA Filament 250g 80M Length 1.75mm Diameter Premium Quality Matera-69%EasyThreed 3D Printing PLA Filament 250g 80M Length 1.75mm Diameter Premium Quality Materails$7.42 $23.85★ 4.6 · 2.3k soldView on AliExpress →
  6. 6ARDEN Metric 2F Straight Router Bit 1/4 1/2 Inch Shank 3-25mm Cutting Diameter Carbide Slo-79%ARDEN Metric 2F Straight Router Bit 1/4 1/2 Inch Shank 3-25mm Cutting Diameter Carbide Slotted$1.40 $6.79★ 4.9 · 1.8k soldView on AliExpress →
  7. 73D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material-60%3D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material$8.86 $22.43★ 4.9 · 1.6k soldView on AliExpress →
  8. 8Easythreed 3D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material-69%Easythreed 3D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material$10.33 $33.78★ 4.7 · 1k soldView on AliExpress →
  9. 9Oil Filter Wrench Heavy Duty Adjustable Steel Strap 60mm-120mm Diameter Universal Car Auto-57%Oil Filter Wrench Heavy Duty Adjustable Steel Strap 60mm-120mm Diameter Universal Car Auto$5.30 $12.36★ 4.7 · 950 soldView on AliExpress →
  10. 1025M PLA PCL 3D Printing Pen Consumables Colored Odorless Safety Plastic Filament Diameter -50%25M PLA PCL 3D Printing Pen Consumables Colored Odorless Safety Plastic Filament Diameter 1.75mm$6.79 $13.53★ 4.8 · 543 soldView on AliExpress →
  11. 113D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material-51%3D Printing Filament PLA 250g Length 80M Diameter 1.75mm FDM Printer Material$12.29 $25.08★ 4.6 · 414 soldView on AliExpress →
  12. 12Alikisscafe Variable Diameter Portafilter Basket Step Down Convex Billet 51mm 54mm 58mm Co-7%Alikisscafe Variable Diameter Portafilter Basket Step Down Convex Billet 51mm 54mm 58mm Coffee$25.79 $27.70★ 4.8 · 315 soldView on AliExpress →
  13. 132/4//6/8/12/18 Channel Micro Rotate Slip Ring 2A Diameter 12.5mm For RC Excavator Model DI-70%2/4//6/8/12/18 Channel Micro Rotate Slip Ring 2A Diameter 12.5mm For RC Excavator Model DIY PTZ$5.24 $17.42★ 4.8 · 292 soldView on AliExpress →
  14. 14ACMER M3 Laser Rotary Roller Y-axis 360° Rotation 6–164 mm Engraving Diameter for Cylindri-58%ACMER M3 Laser Rotary Roller Y-axis 360° Rotation 6–164 mm Engraving Diameter for Cylindrical$42.64 $101★ 4.9 · 78 soldView on AliExpress →
  15. 153 Meter Long Inner Diameter 6.0mm Silicone Infiltering Connecting Tube for Liposuction Inf-12%3 Meter Long Inner Diameter 6.0mm Silicone Infiltering Connecting Tube for Liposuction Infiltration$29.99 $34.02★ 5.0 · 39 soldView on AliExpress →
  16. 1615pcs Watch Band Pin 2.0mm Diameter Spring Bar Stainless Steel Spring Rod Link Pins for Sm15pcs Watch Band Pin 2.0mm Diameter Spring Bar Stainless Steel Spring Rod Link Pins for Smart$1.75★ 5.0 · 38 soldView on AliExpress →

Quick picks

Most popular3mm-20mm Diameter 8mm Shank Straight Bit Tungsten Carbide Single Double Flute Ro$0.92 · ★ 4.8 · 9.6k soldBest ratedBB T Slot Milling Cutter for Metal HSS Woodruff Key Seat Router Bit Thickness 1-$0.92 · ★ 4.9 · 2.9k soldCheapest well ratedUV/IR650 filter diameter 4.0/4.5/5mm CCTV Lens M12 filter optical filter color g$0.14 · ★ 4.8 · 3k sold

How much to pay

Tip: read the latest buyer photos on AliExpress and check the size or model before you order. Products with many orders and a rating of 4.7 or more are usually the safest choice.

Questions

What is the best-selling diameter?

The most popular one is "3mm-20mm Diameter 8mm Shank Straight Bit Tungsten Carbide Single Double Flute Router Bit Wood", with 9.6k orders.

How much does a diameter cost?

In this list prices go from $0.14 to $42.64; half of them cost less than $6.79.

Which diameter has the best reviews?

"BB T Slot Milling Cutter for Metal HSS Woodruff Key Seat Router Bit Thickness 1-12mm Diameter 8-50mm" has an average of 4.9 stars with many orders.

Are there discounts?

Yes. On average these products are 50% below their original price on AliExpress. Prices change often.

Prices and ratings come from AliExpress and can change. We may earn a commission when you buy through our links, at no extra cost to you.