Positioning Wedge 30Ô w Convluted Surface & LSII Cvr Fetal Dopplers 40% larger chestpiece and 60% MSHQ BH190XL 40% larger chestpiece and 60% deeper bell than the 3M Spacious stainless steel interior accomodates splinting sheets up to 24 x 18 working tank with a cover * Features dual thermostatic controls on high (175oF) and low (160oF) that can be adjusted individually * Dual independent heating elements for both settings provide quick warm up and automatically convert to a more effecient circuit once the working temperature is reached * Grounded hospital grade plug and high heat safety switch * 12 W x 34'L x 7 H * A bed positioning wedge contoured to an optimum 30¯ * Provides optimal 30 degree angle of incline for relieving pressure on hipbone and coccyx * Wedge is comfortable and made from convoluted foam * Low Shear II wipe clean outer cover reduces skin damaging friction * Can be disinfected for infection control * Non slip bottom keeps wedge securely in place * Super Soft Convoluted foam surface *