When using silicone hose it's CRITICAL to have a clamp that won't bite or cut into your hose.  Our clamps have rounded edges to prevent hose damage.  Made from heavy duty 316 annealed stainless steel and electropolished to withstand the most severe marine environment.  We go the extra mile and pre-lubricate the bolt threads with Tef-Gel to eliminate thread galling during installation.  Manufactured exclusively to our specifications.  We always recommend double hose clamping.  You should install 4 clamps per hose connection (2 on each side).