... void ratio, low pressure drop, low mass-transfer unit height, high flooding point, uniform gas-liquid ... contact, small specific gravity, high mass transfer efficiency, and the application temperature in media ranges ... , coal gas industry and environmental protection.Size: 5/8" (16mm); 1" (25mm); 1.1/2" (38mm); 2" ... Φ7676×76×2.6730.9294193060 16mm, 25mm, 38mm, 50mm, 76mm plastic pall ring ...