Compact cylinder: SDA series compact pneumatic cylinders are manufactured according to Asia standard, with bore size from 12mm to 100mm, including double acting cylinder, single acting cylinder spring return and spring extent, double shaft cylinders, etc. Instruction about the compact cylinder: Aluminum alloy compact cylinder, pneumatic power Airtact compact cylinder S: With magnet Type: Compound motion type--SDA Single action type SSA--spring pressed out type STA--spring leaded in type Any questions about the compact air cylinder, if you need to purchase some compact cylinder, You' d better to contact with us for the details about the compact cylinder.