Covidien/Medical Supplies 4060 Ultrasound Gel, 250mL Bottle, 12 btl/cs (Continental US Only). High viscosity gel maintains coupling efficiency. Preservatives added to prevent microbial contamination. Salt-free, formaldehyde-free and latex-free formula. Odorless, water soluble and non-irritating formula. Easy twist bottle cap prevents dry-out and minimizes cross-contamination. Quality and performance from a name you can trust.