... . Types provided are as follows:* Side type blower * Top type blower * "Three proofings" blower(TH)1.3 Blowers adopt superior quality stainless ... high durability, high reliability and stability, low noise, great air output, even air pressure, large cooling area, excellent cooling performance, low power ... Supervision Bureau. Qualification rate in spot test is 100%. Air Blower for Dry Type Transformers