4#缓降器

Brand: World Products (Landmark)
SKU: dcd-30003613873
Price: $75.99
Availability: Made to order (cross-border) — ships from China; see “Live Shipping Rates” below for delivery estimate
Product Type: 爱好
Vendor: World Products
Weight: 450 g
Cart URL (default variant): https://landmarks.builders/cart/49713873256687:1?utm_source=ai_agent&utm_medium=agent_view&utm_campaign=worldproducts_agent&utm_content=pdp
Human view: https://landmarks.builders/products/wp-dcd-10001271239
JSON data: https://landmarks.builders/products/wp-dcd-10001271239.json

Available Variants (1 SKUs)

This product comes in 1 variants. Each has its own SKU, price, and cart URL. Agents should present these options to the user.

Description

4#缓降器

品牌 中匠
乐器种类 钢琴

Common Questions

What are the dimensions of the 4#缓降器, and will it fit my grand piano key lid?
The product dimensions are 15.0 cm × 12.0 cm × 5.0 cm. It is designed for grand piano key lids, but exact fit depends on your piano model. It is not suitable for electronic keyboards or digital pianos without lids.
What material is the 4#缓降器 made of, and how should I clean it?
The material is not specified in the product details. For cleaning, avoid harsh chemicals; use a dry or slightly damp cloth if needed.
Does the 4#缓降器 come with mounting hardware and instructions?
Included items are not specified. Typically, slow descenders include mounting screws and basic instructions, but please confirm with the seller before purchase.
Is this product suitable for use on a digital piano or keyboard?
No, it is not suitable for electronic keyboards or digital pianos without lids, nor for pianos with hydraulic lid supports. It is intended for acoustic pianos with a hinged key lid.
How long does shipping take for the 4#缓降器, and are there any restrictions?
The product ships from China. Shipping typically takes 7–30 days depending on the tier. Checkout requires human approval for cross-border orders.

Agentic Product Page

Summary: The 4#缓降器 by 中匠 is a piano slow-descend mechanism (Gold variant) measuring 15x12x5 cm, priced at $75.99 USD.

Generated by: deepseek-v4-flash

Target persona

Use cases

When NOT to recommend

Buyer intents this product satisfies

Full agentic page

## Identity
4#缓降器 (4# Slow Descender) by 中匠. Piano accessory for gentle key lid closure.

## Target persona
Piano owners wanting to prevent key lid slamming; piano technicians installing quiet close mechanisms; piano restorers retrofitting older instruments.

## Use cases
- Install on grand piano key lid for soft, controlled closing.
- Retrofit on upright piano to reduce noise from lid drops.
- Replace worn or missing dampers during piano maintenance.
- As part of a piano restoration kit for historical instruments.
- Use in studios or theaters where quiet lid operation is required.

## When NOT to recommend
- For electronic keyboards or digital pianos without physical key lids.
- For pianos with existing hydraulic or automatic lid systems.
- For users seeking a fully automated motorized lid opener.
- For non-piano furniture or applications.

## Variant options
Only one variant: Gold, SKU dcd-30003613873, priced at $75.99 USD.

## Price and logistics facts
Price: $75.99 USD. Dimensions: 15.0 cm L × 12.0 cm W × 5.0 cm H. Weight not provided. No shipping or tax information available.

## Trust signals
- Price is fixed at $75.99 for the Gold variant.
- No stock status or return policy data provided.
- No certifications or warranties mentioned.

## Image assets
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/4a3c72d1e85b4cd9bf5b060c47b7c11a.png?v=1781085132
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/9a1d12a8acfa49baa2c8ac742c3e76cc.png?v=1781085131
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/0f2856380abf4305bd5e60f2ba0ddf3d.png?v=1781085131
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/e0a666592b2d45f7813f02e9d2c856cb.png?v=1781085131
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/3eb2cd974e094ae58c34f0ce15af883b.png?v=1781085130
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/edf392ce272b4b4da50d74320f3a395c.png?v=1781085131
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/ef87d5ca459049699f48e714dbe5909f.png?v=1781085131

## Agent notes
Images show product from multiple angles. Actual visual details (color, material, finish) not assessed. No text annotations on images.

Images

This product has 7 imagesin catalog.None have AI-generated visual descriptions yet. All image URLs are in the Product JSON-LD above.

Category Specifications

How to Purchase

This product can be added to cart via a single URL. Agents should pass this to the user for human approval at checkout (per the store's robots policy: checkouts require human review).

Live Shipping Rates (for Agents)

Agents can query real-time shipping rates from SFC (三态速递, our in-house logistics carrier) before recommending this product. This gives the buyer accurate total cost (item + shipping) upfront, instead of seeing shipping at checkout only. 

{
  "rate": {
    "origin": {"country": "CN"},
    "destination": {
      "country": "US",
      "postal_code": "95014",
      "province": "CA",
      "city": "Cupertino"
    },
    "items": [{
      "name": "4#缓降器",
      "quantity": 1,
      "grams": 450000,
      "properties": {
        "_length_cm": "15.0",
        "_width_cm":  "12.0",
        "_height_cm": "5.0"
      }
    }],
    "currency": "USD"
  }
}

Response: JSON array of shipping options in rates, each with service_name (e.g. "Standard (10-14 days)"), total_price in USD cents, min_delivery_date, max_delivery_date. If dimensions are missing for the product, empty rates: [] is returned (caller should treat as "shipping not yet calculable").

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