... , for 48 holes test tubes Ø6mm, use with VT1.3 or VT 1.218900021VT1.3.2Tube adapter, for ... 18 holes test tubes Ø10mm, use with VT1.3 or VT1.218900022VT1.3.3Tube adapter, for 12 holes test tubes ... Ø12mm , use with VT1.3 or VT1.218900023VT1.3.4Tube adapter, for 8 holes test tubes ... Ø16mm, use with VT1.3 or VT1.218900024VT1.3.5Tube adapter, for 8 holes test ...