HS Series Oil Rotary Heat Tranfers / 67″ Wide/ 7″ Drum / Manual System: The heatertex rotary heat transfer machine HS Series was designed for a piece by piece or roll to roll operation, making the HS series ideal for shops with a limited space. The HS series is designed with the highest, quality fabrication standards. The HS series is available with a 7″ drum with a ample area of transfer of 44″ and 67″, with a manual and automatic blanket calibration system.