Tire Gauge Key Ring Measure your tire pressure at any time with this hangy tire gauge keychain combo. Will measure up to 50 lbs. of pressure, but is only 3-1/4" long so it is small enough to fit in your pocket. Price: $4.99 ea. Tier 1 Price: $4.99 ea. (100 pcs.)Tier 2 Price: $4.79 ea. (250 pcs.)Tier 3 Price: $4.49 ea. (500 pcs.)Tier 4 Price: $4.29 ea. (1000 pcs.)Tier 5 Price: $3.99 ea. (2500 pcs.)