Model number: 81455 Displacement: 25.4cc Length of guide bar: 12" or 14" Certificate: GS,CE,EMC,EPA,EU1,EU2 Specifications: ... mixed ratio 25:1Lubrication type, saw-chainAutomaticEngine oil tank capacity0.16LFuel tank capacity0.23LLength of guide bar 12" or 14"Cog gap0.375"Weight4 ... , save more gas, more longer time for use. Mini gasoline chain saw