External dimensions (L x W x H): 98 cm×100 cm×(192~210)cm (flat) Adjustable distance between upper and lower traction frame: 18 cm Adjustable distance between front and back of neck traction hook: 22cm Grip bar height adjustable distance: 45cm Traction forcea: 4 lbs, 8 lbs, 12 lbs, 16 lbs (total of four grades) Seat, twisting disk rated load:2000N Foot massager rated load:750N (Dumbbell pieces total 4 pieces, can be equipped with two pieces of a group or four pieces of a group) Note: The traction force a only refers to the mass of the dumbbell piece, not counting the quality of the hanger, neck brace, the support frame of the dumbbell piece and so on. Product use: Used for traction of cervical vertebrae, training of lumbar muscles, massage of back and feet. Features and functions: 1, Can do neck traction. 2, Can do twisting training. 3, can do lumbar, back, foot massage. 4, the height of the traction frame, neck traction hook before and after the distance, the height of the armrests adjustable to adapt to the use of different heights of people. 5, four adjustable traction.