What does the needle pitch of 4.3 mm mean and how does it affect the sensations? — Universal Belt M 4.3 Ag 140 × 65 mm, 90 × 65 mm, 68 × 65 mm, 77 × 65 mm – Lyapko

The card does not explain what the designation «4.3 Ag» in the name means or describe the sensations. General information (not a manufacturer's instruction): on Lyapko needle applicators such a number usually denotes the needle pitch (the distance between adjacent needles) in millimetres and Ag denotes silver; the smaller the pitch, the more densely the needles are placed. According to the card, the needles are made of copper, zinc, iron, silver and nickel — metals needed by the body (manufacturer's claim); the base is medical rubber.

The card gives no detailed sensations, session times or comparison with other models; see the manufacturer's instructions for this information. If you have sensitive skin or a known allergy to metals (including nickel), consult a specialist before use.