Stable up to 450°C - lowest bleed for longest column lifetime Reliably meets all ASTM D6352, D7169 and D7500 specifications. 100% dimethyl polysiloxane phase allows easy comparison to historical data. Individually tested for guaranteed performance. 7" coil diameter. Similar phases: MXT-1HT SimDist, DB-HT SimDis Pro Steel, CP-SimDist UltiMetal, ZB-1 X SimDist