Car power saver-- high octane performance with lower octane fuel. Economizer fuel saver-- applications: cars; buses; trucks; scooters; generators; motorcycles; ambulances. Magnetic fuel saver-- help pass emission testing. Vehicle magnetic fuel saving-- simple to install: no tools nor cutting of fuel lines required, install magnet as close to engine as possible, magnetic fuel savers are held in place by the cab. Xp-2 fuel economizer-- 50% reduction of and hydrocarbons. Save fuel, save money, more miles per gallon,50% reduction of carbon monoxide and hydrocarbons Color: yellow Material: ABS<br><br>Package Contents: 6 x car fuel saver / 4 x car fuel saver / 2 x car fuel saver Only the above package content, other products are not included. Note: Light reflection 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.