SkinTact FSVB011 Foam Solid Gel EKG Stress Test Electrodes by Leonhard Lang USA. Skintact FSVB011 foam solid gel electrodes feature Aqua-Tac gel adhesive for superior adhesion in all situations. Latex & PVC free, diaphoretic, hypoallergenic, Ag/AgCl, 35mm x 53mm. Great for Stress Testing. 30/PCH, 40PCH/BX (1,200). Priced per Box.