... high quality,good price SpecificationRECC720S-100 New Electric Cylinder 1.DIN18252 Standard2.computer keys 3.60~120mm cylinder4.high ... quality,good priceFeatureRECC710S-100 New Electric Hydraulic Cylinders 1. Good generalization: Easy to replace the tradional cylinders ... Power SupplyHigh performance 3.6VLi-SoCL2 Battery (ER14250 1/2 AA size)2Battery LifeMaximum to 30000 door open operation, ...