![AST25B AST25B](https://cdn11.bigcommerce.com/s-iyf92x0i7o/images/stencil/300x300/products/205/880/AST25B_Sq__26486.1602793578.jpg?c=1)
While every AeroStab connection piece comes with a rubber O-ring pre-installed, it is important to also add a titanium spacer between every connection. As O-rings ensure a snug fit, AeroStab GR2 Titanium Spacers protect the O-rings from getting torn during adjustment.