Extra Transducer for FD2 MD2 SD2 & D900 3mhz Emergency First Aid Products Foam base may be wiped Select Ear:Left Ear Foam base may be wiped with damp cloth * Neoprene rubber cushion insert can be patched or repaired to extend use * Customized Jay foam base and ROHO air insert are fluid resistant * Cushion size: 20 W x 18 D * Wide ranges of sizes also available to fit chair widths 14 to 24 upon request * Weight capacity: 550 lbs * HCPCS Suggested Code: E2622 * 2 year warranty Layered noise reduction to reduce background noise Transducers for fetal dopplers * For vascular use (the lower the transducer number the deeper it will read)