BOOST products spring hose clamp made of stainless steel. Thanks to the spring, a constant clamping and holding force is always guaranteed. In addition, the bolt has a self-locking nut. This prevents the bolt from loosening. These types of clamps are well suited for intercooler piping and silicone hoses, as they ensure constant strength and tightness. Unlike many other hose clamp manufacturers and suppliers, these hose clamps cannot rust. BOOST products spring hose clamps are made of SS304 stainless steel, a very high quality stainless steel with high corrosion resistance. Note: The tightening torque should not exceed 5 Nm! The bolt, spring and nut are made of galvanized steel (this is needed for an impeccable function).