Skintact FS-521 Premium Solid Gel Electrodes are perfectly sized, 35 x 50 mm, for all Stress and Holter Monitoring applications. Skintact's Ultra-Tact adhesive ensures you a secure skin contact while remaining Skin-friendly to your patient. ( 100% latex and pvc free) Sold by the package of 30 ECG Electrodes, 1500 total ECG Electrodes per case. Availability: Usually ships the same business day Skintact FS-521 High Performance ECG EKG Electrodes A1FS521Regular price: $5.70Sale price: $3.60 Copyright 2006-2011, A1cardiology.com