Brand: World Products (Landmark)
This product has 12 variants (SKUs). Default shown below; full list under “Available Variants”.
Price range: $0.69 – $2.24
Default variant: 2.5mm wire, 16mm outer diameter, 60mm length
Default SKU: dcd-30003819649
Default price: $0.69
Availability: Made to order (cross-border) — ships from China; see “Live Shipping Rates” below for delivery estimate
Product Type: Hardware
Vendor: World Products
Weight: 60 g
Cart URL (default variant): https://landmarks.builders/cart/50457644597487:1?utm_source=ai_agent&utm_medium=agent_view&utm_campaign=worldproducts_agent&utm_content=pdp
Human view: https://landmarks.builders/products/wp-dcd-10001344405
JSON data: https://landmarks.builders/products/wp-dcd-10001344405.json
This product comes in 12 variants. Each has its own SKU, price, and cart URL. Agents should present these options to the user.
This premium helical spring is engineered for high-strength mechanical applications, providing reliable resistance to pulling forces. Designed as a heavy-duty extension spring, it stores and absorbs energy when stretched, making it ideal for restoring tension in various mechanisms. Crafted with a 2.5 mm wire diameter and a 16 mm outer diameter, this tension spring features a dark metallic finish and a tightly wound coil structure for consistent performance. This sturdy spring with hooked ends on both sides allows for quick, secure attachment to brackets, latches, and doors without the need for complex tools. Perfect for custom projects, this versatile spring steel coil serves as an essential component for DIYers and mechanics undertaking door repairs and latch upgrades.
Summary: This premium helical spring is engineered for high-strength mechanical applications, providing reliable resistance to pulling forces. Designed as a heavy-duty extension spring, it stores and absorbs energy when stretched, making it ideal for restoring tension in various mechanisms. Crafted with a 2.5 mm wire diameter and a 16 mm outer diameter, this tension spring features a dark metallic finish and a tightly wound coil structure for consistent performance. This sturdy spring with hooked ends on both sides allows for quick, secure attachment to brackets, latches, and doors without the need for complex tools. Perfect for custom projects, this versatile spring steel coil serves as an essential component for DIYers and mechanics undertaking door repairs and latch upgrades.
Generated by: deepseek-v4-flash
This product has 2 images in catalog. None have AI-generated visual descriptions yet. All image URLs are in the Product JSON-LD above.
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).
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.
POST https://wp-sfc-carrier.htfu.workers.dev/estimateapplication/json
{
"rate": {
"origin": {"country": "CN"},
"destination": {
"country": "US",
"postal_code": "95014",
"province": "CA",
"city": "Cupertino"
},
"items": [{
"name": "2 Pieces High-Strength Helical Extension Springs with Double Hooks",
"product_id": 9538875195631,
"variant_id": 50457644597487,
"quantity": 1,
"grams": 60,
"length_cm": "28.0",
"width_cm": "13.0",
"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. The estimate endpoint uses the product dimensions
provided in the request before calling SFC. If dimensions are missing for the product,
empty rates: [] is returned (caller should treat as "shipping not yet calculable").