All series 34 are 20″ long expanded and 12″ long closed. They have 3/8″ ball socket type ends with a rod diameter of 5/16″ and a cylinder diameter of 3/4″.
Stainless Steel shell and rod ensure corrosion-resistance and up to 30% lower cost than competitive stainless springs. All Stainless Steel Springs come with high-strength, corrosion-proof composite end fittings.
![Attwood Stainless Gas Spring - 12" - 10mm Socket [ST34-40-5]](https://www.hotwildcamplab.com/wp-content/uploads/2026/09/attwood-stainless-gas-spring-12-10mm-socket-st34-40-5.webp)