Jack Upward Movement Flange Type Thread Jack Worm Screw Mechanical Screw Jacks I. Confirmation of model: HK2TVHK3T\H5T\HK10T\HK15T\HK20T\HK30T Second, confirm the reduction ratio: [6:1] [8:1] [12:1] [24:1], three speed ratio of any one, 6:1 lift the most 24:1 slowest. Third, confirm the head of the screw, [flange type], [garden column type], [threaded], [rot head type] four kinds of head choose one. Fourth, confirm the length of the screw: the standard is 500mn long, the length can be customized according to the requirements of the guests, can be longer or shorter, beyond the 500mm specific price, please see the price list. Fifth, confirm whether you need to add anti-rotation. Handwheel, protective hard tube, protective hose, nut, need to be charged separately, please consult customer service. Six, confirm the motor specifications: the standard is a three-phase 3807 motor, speed 1400 rpm. If you need to match: single-phase 220V motor inverter motor brake motor price set separately. Seven, confirm the lift body color (default blue)