Shah Patil & Company manufactures Inner Grooved Tubes for Improved Heat Transfer Coefficient. Pune Fin Tube Pvt Ltd is an ISO-9001:2000 certified company. These are copper tubes with 15.87mm outer dimension and 75 internal integral spiral grooves. Inner Grooved Tubes for Improved Heat Transfer Coefficient are used as refrigerant, for heat exchangers for air heating equipment such as room air-conditions and package Air conditions.