👉 High-quality machined piston head with one NBR sealing ring 2.4mm thick
👉 Bearing for smooth rotation of the spring. We recommend always leaving it on during assembly if the bearing is completely missing from the spring mandrel. It can be removed to reduce the power (approx. 0.1-0.15J) so that the spring is not compressed so much.
👉 Total head weight with bearing 11.8g; weight without bearing 8.1g
