Identify the instrument model
Identify the instrument model. Compare the information published for the exact item and keep the product name or SKU for reference.
$30.00
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Contiguous 48 states & DC · 4–7 business days total
30-day returns
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Questions about this item? [email protected]
Product brand: Allparts Music
The details
Single Schaller M4 180 (light) sealed bass key, with hardware, 20:1.
Elegance and lightness for electric basses
Experience the lighter side of heavy duty. The M4 180 light tuning machine for electric basses – legendary Schaller quality at a stunning 40% less weight. Its specs, looks and superior performance define this tuner as a true no-compromise when it comes to weight reduction.
A special female screw guarantees precise positioning and fixing of the shaft.
High gear ratio of 1:20 ensures a very precise tuning.
All sealed tuners are lubricated with Schaller special grease for lifetime maintenance-free service.
All parts are precision-crafted and surface-finished, the self-locking drive ensures an even, delicate and steady tuning.
All string posts are made of high-grade brass and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.
Technical specification
Gear ratio: 1:20
Weight: 52 g per piece
Screw lug: 180 degree


Know the fit
Experience the lighter side of heavy duty. The M4 180 light tuning machine for electric basses - legendary Schaller quality at a stunning 40% less weight. Its specs, looks and superior performance define this tuner as a true no-compromise when it comes to weight reduction.
Weight: 52 g per piece
Choose & use with care
Identify the instrument model. Compare the information published for the exact item and keep the product name or SKU for reference.
Match gauge, dimensions or connection. Check the selected listing and variant, including the supplied components before ordering.
Keep fittings and instructions together. Use the directions supplied for your selected item. Contact support if an important detail is missing.
Follow the instructions supplied for the exact product. Features, limits and care directions are specific to the selected model.
Order preparation takes 1–3 business days, followed by 3–4 business days in transit: 4–7 business days in total. Standard shipping is free to the contiguous United States and DC, with no minimum order.
Request a return within 30 calendar days after delivery. We pay return shipping. After receipt, inspection and initiation of an approved refund take 5–7 business days.
Before you decide
Identify the instrument model. Read the actual item description, included parts and options. The collection contains different models; a feature stated for one item should not be assumed for every product.
Match gauge, dimensions or connection. Compare the dimensions and compatibility stated for the selected item with the space or equipment you intend to use. If a required measurement is absent, send the product name or SKU to [email protected] before purchasing.
Available choices are shown on the individual product page. Select the actual option labels before adding a variable product to your cart. Photos and specifications should be read together with that choice; availability is specific to the selected configuration.
Keep fittings and instructions together. Follow the instructions supplied for the exact model. Do not assume that all items have the same materials, installation method, care directions or intended use.