High Durability Cylinder is the Premier Cylinder Set HD
If you want higher power,we recommend this Cylinder.

B↑ Taper Cylinder Head
Made of SUS303. The nozzle is longer than normal and has tapered line backside. They make stable output.
To keep airtight, this nozzle has O-ring.
This item can be attached with Normal cylinder, but Normal cylinder has low-thread and it cannot fix tightly.
We cannot tell whether they can attach or not, so we don't recommend attachment with Normal Cylinder.

B↑Hard Piston : you'll get High durability
This piston has NO VC,so it's a simple piston but the simple is superior to durability.
The body: Made of Duralmin.
The Ring: Made of Derlin.
The End: Made og Stainless.
We use the most suitable material for each parts, so this piston has high durability.
Hard Piston can make more velocity than Vacuum Piston because of its hight airtight.

B↑Spring Guide
Made of Stainless steel and Polished,so it makes smooth action.
It has a thrust ring that made of derlin.
This spring guideis the best for B↑HD Piston. The shuft is longer than Spring Guide for VC Piston.
Please use with fat Dia.Spring.