Compression springs look simple until you need to match free length, wire diameter, outer diameter, and material to a specific space in a machine or project. The four listings here show how different those choices can be: a 300mm spring steel compression spring is listed at USD 3.69, a 305mm black spring steel spring is listed at USD 85.63, a more compact 15-100mm spring is listed at USD 20.89, and a 305mm 304 stainless steel spring is listed at USD 82.25.
Quick take
If you want the lowest listed price in this group, the 300mm compression spring is the obvious match. If you want stainless steel, the 304 stainless listing is the one that mentions that material in the title. The Goo Better spring covers a wider wire range, while the CooBetter spring gives you a shorter range to work with.
Listed price comparison
| Listing | Listed price | Price bar |
|---|---|---|
| CooBetter Compression Spring 1.5mm Wire Diameter, 15-100mm Length | USD 20.89 | |
| 300mm Compression Spring, Spring Steel | USD 3.69 | |
| Goo Better Black Compression Spring, 305mm Length | USD 85.63 | |
| 305mm 304 Stainless Steel Pressure Spring | USD 82.25 |
Decision matrix
| Decision point | Likely match | Why it fits |
|---|---|---|
| Need a compact option for a smaller space | CooBetter Compression Spring | Listed outer diameter 8-25mm and free length 15-100mm. |
| Need a 300mm spring without spending much | 300mm Compression Spring | Listed as spring steel with open ends and a 300mm length. |
| Need a long spring with a wider wire range | Goo Better Black Compression Spring | Lists wire diameter 0.3-6mm and outer diameter 3-50mm at 305mm length. |
| Need a long spring in stainless steel | 305mm 304 Stainless Steel Pressure Spring | Title names 304 stainless steel with outer diameter up to 60mm. |
Product notes
CooBetter Compression Spring 1.5mm Wire Diameter, 15-100mm Length, OD 8-25mm
The CooBetter spring is the one to look at when your project needs a spring in the shorter part of the length range. It is made of spring steel and is listed as new, with outer diameter 8-25mm and free length 15-100mm. The stated wire diameter is 1.5mm, and the outer diameter and length are both given as ranges, giving you more room to fit an application. The description also notes that other materials, types, colors, sizes, quantities, and shapes are available, and customisation may be possible for special needs. The trade-off: the wire diameter is fixed at 1.5mm, so if you need thicker wire, a longer spring option will be a better starting point.
300mm Compression Spring Various Size, 2-42mm Diameter
At the lowest listed price among these four, this spring steel compression spring is the one to check if you want a 300mm length and want to keep the outlay modest. It is listed as new with open ends and a natural-color surface, packaged in one piece. The title calls out a diameter range of 2-42mm, while the attributes list a 4mm outer diameter and a 300mm length; that mismatch means the product may be more clearly understood by the specific dimensions in the listing rather than the broad title. The limitation is the outer diameter figure: if your build calls for a larger OD, this option's specific dimension may not line up.
Goo Better Black Compression Spring, 305mm Length
This Goo Better spring is the highest-priced option in the set, and it brings a wide specification range: 305mm length, 0.3-6mm wire diameter, and 3-50mm outer diameter, all in spring steel. It is described as new with open ends, and the black finish is part of the title. If you need a long spring with room in the wire range, this option gives you the top end of the scale among the four. The limitation is material: it's spring steel, not stainless. For a stainless alternative, the 304 stainless steel option is the one that explicitly names stainless in the title.
305mm 304 Stainless Steel Pressure Spring
The stainless steel option in this comparison is the 304 stainless listing, which gives you a 305mm length with wire diameters from 0.3-5mm and outer diameters from 3-60mm. The title names 304 stainless steel, and the description mentions uses such as tractors, agriculture, industry, metal construction, and model making. It is listed as new with open ends. The reason to choose it is the material; it is the only title here that names a stainless steel grade. The limitation is the wire range: it goes up to 5mm, while the Goo Better spring in this set goes up to 6mm, so those needing the thicker wire should look at that option.
Final recommendation by use case
- Lowest listed price among the four: the 300mm compression spring.
- Shorter range and custom possibility: the CooBetter spring.
- Long spring steel option with wire up to 6mm: the Goo Better spring.
- Long stainless steel option: the 304 stainless spring.
