The surface of the cylinder has increased the hard oxidation technology, which increases the surface hardness of the cylinder, is not easy to deform, and is durable. ONNT Brand Airtac SMC Telescopic Double Cylinder Air Compressor MSQB-10A Cylinder 180 Degrees Rotary Pneumatic Air Cylinder Msqb-20r With Buffer | UK Aluminum Alloy Air Cylinder The domination 180 for this year has be used since the early medieval period, wh the Anno Domini caldar era became the prevalt method in Europe for naming years With the increase of pressure, it automatically improves the sealing performance and lasts for a long time Discover the SMC Type 15mm 180° Rotary Pneumatic Cylinder. Durable, high-quality, adjustable, and efficient for all your pneumatic needs. Buy now Made of high quality aluminum alloy cylinder, sturdy, anti-corrosion and not easy to rust.