harpfeas XX060 Black Guitar Knob Set, 1 Volume and 2 Tone

The harpfeas XX060 guitar knob set is a three-piece black plastic replacement set with one volume knob and two tone knobs. The listing specifies metric 18-spline knobs for many 6 mm split-shaft pots, while excluding USA/imperial-size pots, so shaft fit is the key compatibility check.

At a glance

Three knobs are arranged for one volume and two tone controls.
Listing specifies coarse 18 splines and a 6 mm inner hole for compatible split-shaft pots.
Black plastic construction in a classic, round shape.

Price

$3.49Save 50%

Reference price: ~~$6.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

The stated one-volume, two-tone layout suits replacement of a matching three-control set.
The listing provides spline count and inner-hole dimensions to help compare against existing pots.

Cons

Plastic construction may not suit buyers seeking metal control knobs.

Technical specifications

11 specifications

Identity
Brand	harpfeas
Model	XX060

Dimensions and installation
Form factor	Round
Dimensions listed	3.94"L x 0.79"W
Weight listed	13.61 g
Shaft fit claimed	Metric size, coarse 18 splines, fit most Asia/Europe made 6mm(15/64 inch) split shaft potentiometers, NOT fit USA/imperial size potentiometers.
Inner hole, height and base diameter	Inner hole diameter: 6mm(15/64 inch), height: 13.2mm(33/64 inch), base outer diameter: 25.6mm(1-1/64 inch)

Materials and appearance
Material listed	Plastic
Color	Black
Style	Classic

Set configuration
Knob arrangement	Set of 3 Knobs (1 Volume+2 Tone)

What to know before buying

The listing says the knobs fit most Asia/Europe-made 6 mm split-shaft potentiometers, but not USA/imperial-size pots. Confirm the shaft standard, diameter and spline fit before ordering. Its catalog dimensions of 3.94"L x 0.79"W do not match the separately stated individual knob measurements, so use the detailed inner-hole, height and base-diameter figures when checking fit.

What’s in the box

3 knobs: 1 volume and 2 toneIncluded
CoverCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Players replacing a matching three-knob volume-and-tone set on a compatible import-style guitar or bass.
Buyers seeking black plastic knobs and able to verify metric, coarse 18-spline, 6 mm split-shaft compatibility.

Less suited to

Owners of USA/imperial-size pots, according to the listing.
Buyers who need metal knobs or have not confirmed their pot shaft dimensions and spline pattern.

harpfeas XX060 Black Guitar Knob Set, 1 Volume and 2 Tone · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 21 ratings

5 stars80%80%
4 stars13%13%
3 stars0%0%
2 stars7%7%
1 star0%0%

The supplied evidence contains aggregate star ratings but no review comments. Ratings lean positive overall, with some two-star ratings, but the small sample and lack of written feedback do not establish what buyers liked or disliked. They cannot confirm shaft compatibility, which remains the main practical consideration for this replacement set.

Frequently asked questions

How many knobs are included, and what is the layout?

The product feature listing states a set of three knobs: one volume and two tone.

Which potentiometer shafts does the listing specify?

It claims a fit for most Asia- or Europe-made 6 mm split-shaft potentiometers with coarse 18 splines. It says the set does not fit USA/imperial-size potentiometers.

What are the stated individual knob dimensions?

The listing gives a 6 mm inner-hole diameter, 13.2 mm height and 25.6 mm base outer diameter. It also shows separate overall dimensions of 3.94"L x 0.79"W, which do not align with those individual measurements.

Are the knobs metal?

No. The listed material is plastic.