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RETRO ARMS piston head,
POM is made of resin and the weight of the piston head + O-ring is 3.6g.
It weighs just 8.7g including the thrust bearing and fixing screws.
When fixing the mounting screws, please use a locking agent for plastic (such as Loctite 425).
There may seem to be nine intake and exhaust holes, but
The area of the hole that is open as an air passage is about 40% of the diameter of the hole.
The effective area is equivalent to approximately 3.6 Φ2.5mm holes.
![[RETRO ARMS] CNC Piston Head POM](http://rock-et.jp/cdn/shop/files/RETRO-7206_1024x1024.jpg?v=1750401403)
