MINI hose clamps are easy but firm clamps with smooth strips on both sides. On the upper side the hose clamps are equipped with a screw and a metric thread. As the metric screw on the hose clamp has a smaller pitch compared to that of the screw on the for example AMERIC hose clamp, it is possible to tighten the hose clamps onto the hose with greater precision. In contrast, MINI hose clamps have a smaller difference between the minimum diameter of the hose clamp and the maximum diameter of the hose clamp. This type of hose clamp is therefore used in more complicated assemblies where durability of the tightened hose clamp and the service life of the hose clamp are accentuated. The nut of the screw on the hose clamp is firmly pressed in, which eliminates the possibility of it falling out during the unscrewing of the hose clamp. The strip of the MINI hose clamp is 9 mm wide. MINI hose clamps are available in two versions. The W1 version hose clamp is made of zinc plated steel, whereas the W4 is made of stainless chromium steel. MINI hose clamps are used especially for hoses with small dimensions - such as for hoses for filling fuels. Hose clamps are tightened or loosened using a flat tip screwdriver or a hexagonal key.