Prosecutors charged that the 10-person ring were guilty of smuggling, possession, transportation and distribution of amphetamines.
The defendants faced charges of aggravated drug offences, with the prosecutor calling for close to the maximum sentence for the crime, 10 years in prison.
The Helsinki District Court found the nine men and one women guilt, slapping them with sentences ranging from a suspended prison sentence of just over one year for being an accessory to aggravated drug offences, to 10 years for the main charge.
The Court dismissed the main charge against one of the defendants, instead sentencing that person to five months in prison on a lesser charge.
The group also faced charges related to doping. According to the prosecution, one of the men had in his possession 7,000 capsules of a doping substance.
Some of the defendants already had prior convictions and the amphetamine caper was done while they were on probation. According to the prosecution and police one of the men was the head of the Bandidos MC Lakeside criminal group.
Police: Nearly 40 kilograms sold
The details of the case involved the trafficking of construction scaffolding packed with some 60 kilograms of amphetamines last January. The defendants were held in southern Finland at the beginning of the year.
The prosecution and police said that the drugs were brought into Finland from the Netherlands through Germany, Denmark and Sweden to Finland via the Tornio border crossing – the felons believed that the drugs were less likely to be detected at this crossing than at a harbor.
Police managed to seize about 21 kilograms of the substance, however they said they suspect that the defendants managed to sell nearly 40 kilograms of the drug in southern Finland. Police said the street value of the haul was around 1.2 million euros.