2 COMPATIBLE 3.5mm LEAD CABLES (4 Snap on Connection Leads)for OMRON HV-F178, HV-F128, PM3030 w/(8) PADS =>>>Once you replace your Omron Cable with this cable, the Electrodes presented here are much more cost effective, versus buying the proprietary pads, and you will save a SIGNIFICANT AMOUNT OF MONEY using these pads instead of the Proprietary Omron Brand Pads. These are great quality pads that work with the supplied 3.5mm lead cable. These electrode pads work with this lead cable that connects to the Omron Unit.Here is some feedback from one of our recent customers. HERE IS A FULL LIST OF MODELS THAT THIS CABLE IS COMPATIBLE WITH(NOTE-CABLE IS COMPATIBLE W/ SUPPLIED PADS IN THIS AD )PM3030,HV-F127,HV-F128HV-F124,HV-F124PHV-125,HV-126,HV-F002AHV-F115HV-F122Pads have a thick layer of non-irritating conductive gel that adheres well to your skin, but leaves no sticky residue when the electrodes are removed. Pads are Reusable and fit 3.5mm snap connect lead(included) Pads wipe clean with a damp cloth. The Measurements of pads are: 2" x 3". Includes 8 Pads (4 sets) and (2 QTY) of 4 snap connection lead cables with 3.5mm Plug to connect to Omron Unit.. Each set of 2 pads are packaged in a resealable storage bag. Thank you and have a wonderful day!