Inaccurate air pressure of chambers or air floor can cause low performance of inflatable boat. Overpressure can be cause blow-out of your inflatable boat. To prevent these events from happening it is important to maintain proper air pressure. Bravo air pressure gauge designed to fit into Halkey-roberts(H-R) valve. This air pressure meter can be used on RIBs, soft bottom inflatables or river rafts.This air pressure gauge can provide readings of up to 14.7psi or 1 bar Please be informed that warm weather will increase the air pressure,cold weather will reduce the air pressure, - it is important to recheck air pressure in the chambers when the temperature change. Shipping information: All items are in stock and will be shipped within 24 hours after receiving cleared payment. Please note that items purchased on weekends will shipped the next working day. We offer the competitive prices online and Free Shipping to Lower 48 states. Sorry we can not to Hawaii,Alaska,Puerto Rico . All International Buyers are responsible for paying any required duty or import taxes. Please note that we are not able to ship to PO Box address. Local pick up welcomes. please contact us for the details. Warranty Return: All BRIS boats come with 3 years warranty on the seams and 1 year on auxiliary fittings, such as handles, oarlocks, oar holders, D-rings, etc.Damage and normal wear, tear are not covered . Guarantee begins when product is delivered. Return is accepted within 30 days of receipt after you fully explain the problems. Please allow up to 5 business days for returns to be processed. All items must be returned in original packaging, including all accessories.Such as aluminum floor, oars, foot pump and repair kits etc. Customers are responsible for charges associated with shipping of returning item .