Ultra-Premium Pump 12 - Transparent. This Ultra-Premium Pump 12* comes with a total cylinder length of 32.5 cm (12*) and an inner diameter of 4.8 cm (1.9*). this high-quality pump gives you sample possibilities to grow in both directions! The total length of the hose is 27 cm (10.6*) and is made of smooth Silicone. Surprise yourself on how big you can get! This variant comes with a metal pistol grip pump with gauge and a quick release valve for your comfort.