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Ratio

Coffee filters for the Ratio Eight Series 2

Takes this filter

Universal 8–12 cup basket

8½ × 3¼ in216 × 83 mm · Flat-bottom basket

Wholesale only FLTR PUR: 8–12 Cup Basket Coffee Filters (Bunn 20106 Style)

Sold as 8½ × 3¼ in · measures 216 × 83 mm (8½ × 3¼ in) laid flat · 1,000 filters

We make this filter for wholesale customers and sell it by the case.

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Confirmed with Ratio’s website, ratiocoffee.com, 13 Oct 2026.

Filter measurements

Universal 8–12 cup basket laid flat, drawn to scaleFlat diameter 216 mm (8½ in), base 83 mm (3¼ in).8½ in216 mm3¼ in83 mm
Universal 8–12 cup basket
A Across, laid flat8½ in216 mm
B Base3¼ in83 mm
C Wall paper2⅝ in67 mm
BC
Side view
Top: the filter laid flat, drawn to scale from the manufacturer’s size. A is measured across it, B is the flat bottom, and C (half the difference) is the paper that folds up to form the wall. Side view: how that paper stands up in the brew basket; the wall angle depends on the basket.

The Universal 8–12 cup basket filter and its other names

Brand and partSizeAlso sold asFLTR PUR
Universal 8–12 cup basket8½ × 3¼ in216 × 83 mmBunn BCF100, Bunn 20106 (8.5 × 3.25 in), Melitta basket, Amazon Basics basket, Brew Rite 8-12 cup, If You Care 8 in basket, Mr. Coffee basket, Hamilton Beach basket, Melitta Super Premium 8-12 Cup Basket, Ratio Six / Eight S2 basketWholesale only 8–12 Cup Basket Coffee Filters (Bunn 20106 Style)

How long a case lasts

8–12 Cup Basket Coffee Filters (Bunn 20106 Style) comes 1,000 filters to a case. One filter per brew basket per batch; count each side of a twin brewer as its own batch.

Brewers that take the same filter

More Ratio coffee makers

Questions and answers

What size coffee filter does the Ratio Eight Series 2 use?

The Ratio Eight Series 2 uses the Universal 8–12 cup basket (8½ × 3¼ in, 216 × 83 mm) filter. We make this size for wholesale customers.

What is the part number for the Ratio Eight Series 2 coffee filter?

Universal 8–12 cup basket (Bunn BCF100, Bunn 20106 (8.5 × 3.25 in), Melitta basket, Amazon Basics basket, Brew Rite 8-12 cup, If You Care 8 in basket, Mr. Coffee basket, Hamilton Beach basket, Melitta Super Premium 8-12 Cup Basket, Ratio Six / Eight S2 basket); the same size is also sold as Bunn 20106.

Does the Ratio Eight Series 2 take a 8½ × 3¼ in coffee filter?

Yes. The Ratio Eight Series 2 takes the Universal 8–12 cup basket, a 8½ × 3¼ in (216 × 83 mm) flat-bottom basket filter.

Which FLTR PUR filter is compatible with the Ratio Eight Series 2?

8–12 Cup Basket Coffee Filters (Bunn 20106 Style) (sold as 8½ × 3¼ in, 1,000 filters to a case), sold by the case to wholesale customers.

Can’t find your brewer? Measure your filter.

  1. A · Flat diameter: lay one filter flat and measure edge to edge.
  2. B · Base: measure across the flat bottom of a formed filter.
  3. C · Wall height: measure the fluted side from base to rim.
ABC

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Spot an error, or know a brewer we’re missing?

Every change is checked against the manufacturer before it goes live. A link to a manual, spec sheet or the brand’s own page helps most.

Brand names are trademarks of their respective owners, used only to identify compatibility. FLTR PUR is not affiliated with or endorsed by these manufacturers.