construction,rubber jacket and copper head,High-quality precision movement,accurate measurement Heavy duty steel & brass body feels solid in the hand and is built to last rugged rubber protector,providing extra protection from accidental drops and everyday storage. Compact size features an easy-to-read 1.5 inch dial (psi),suitable for most cars,trucks,SUVs,motorcycles,bikes,spare tires,or RVs.This top-rated,professional tire monitoring system is easy to use and is reliable in all weather conditions.A perfect accessory for your car,motorcycle,truck,bike,SUV,RV or ATV - it not let you down. Make sure the tire is cold before you start. the 45 Degree extended head against your tire's nozzle till the pointer stops moving.Hold the tire pressure gauge at eye level and get the reading of the pressure.Check the manufacturer's recommended PSI (normally it can be found on the side of the tire) and make sure the pressure isn't too low or too high. the reset button on the gauge and put the nozzle cap back on the tire's nozzle when you measuring. Product Specifications,Accuracy:+/-2 PSI,Measuring Range:0~100 PSI Colour:Black Material:stainless steel + rubber Weight:3.88oz/ 110g Size:Dial Diameter:1.5 inch Length:11.5cm Diameter:5.5cm Package Contents: 1*tire pressure gauge Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.