4PCS 1.25" inch Stainless Steel T-bolt Clamps Turbo Pipe Hose Coupler 37-42mm

Clamping range: 1.25" (37mm to 42mm). 4pcs 1.25" T bolt clamp. 1.25" 37mm to 42mm. 1, If you have a 2.5" (63.5mm) ID silicone hose, then calcuate your hose OD= 63.5+5x2=73.5mm. The size listed is the size silicone hose this clamp will fit over.