Latex free. Tycos 509 Series aneroids provide all the accuracy and reliability you expect from Tycos - at an affordable price. Lifetime calibration and manufacturing warranty. Precision, jeweled bearings resist wear for consistently accurate readings. Unique phosphor-bronze aneroid bellows ensure consistent pressure measurement. Visual check of accuracy on the dial. Strong die-cast zinc internal housing protects mechanism. The Wall style has an 8' coiled tubing with 90 swivel for flexible reading, 10 forward tile to reduce glare. The Mobile style has 360 swivel with adjustable height stand, and 4' coiled tubing.