> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Extension Spring (8mm OD, 8kg Max Load, 48-80mm Length)

**Type:** Product page · **SKU:** GB-2915-0001-0002 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/extension-spring-8mm-od-8kg-max-load-48-80mm-length.html ([markdown](https://core-electronics.com.au/extension-spring-8mm-od-8kg-max-load-48-80mm-length.html.md))

This extension spring is commonly used with synthetic cable in order to retain tension where the cable path causes slight variances in the.....

## Pricing

- **Price:** $9.30 (inc GST) — $8.45 AUD, exc GST
- **Quantity discounts:** 10+ $8.04 (exc GST) · 25+ $7.61 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 1100 more in 7–10 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-2915-0001-0002:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/GB-2915-0001-0002:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This extension spring is commonly used with synthetic cable in order to retain tension where the cable path causes slight variances in the amount of slack in the line. The spring has an overall center-to-center distance of 48mm at rest, but can be stretched 32mm for an overall length of 80mm. Each loop end has an inner diameter of just over 4mm so it can easily fit onto an M4 screw. The spring is made from spring-tempered steel to retain its rate and shape over thousands of cycles.

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/2915-0001-0002_106256359f3.zip)

### Specs

| Weight | 5.2g |
|---|---|
| Material | Spring-Tempered Steel |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-2915-0001-0002-1.jpg)