The quality of an electrostimulation device always depends on the quality of the electrodes used.You will advantage from the use of polymer material which distributes the pulses in a homogeneous way.Good elasticity, strong adhesion, and conductivity. gel pads are compatible with Abs , to make your workout efficient and comfortable, the gel pads must be replaced after 20-30 uses.Application: Compatible with Abdominal training beltWeight: 270GItem Type: Massage & RelaxationApplication: WaistModel Number: Abdominal Gel Padscolor:BlackMaterial: Hydrogelsize:Square 10 x 10cm, Oval 7 x 10cmPackage Contents:6 Sets x 3 gel pads (18 PCS)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.