100% 304 Stainless V-Band flange and clamp kits. Designed from the ground up using a low profile V-band assembly, and low profile male and female interlocking flanges. The clamp features thick heavy duty retainers, and thick band clamp to avoid stretching and warping from the many heat cycles they go through. The Flanges are CNC from billet material(not from cast material like some competitors). Being that it is CNC machined from billet stock they are more durable: they resist warping when welding, they are heavier because of less porosity from the casting, and can withstand constant heat cycling without becoming brittle. -100% 304 Stainless Steel V-Band Clamp -Thick Heavy Duty Retainer -347 Stainless Nut -420/431 Stainless Bolt -CNC Machined 304 Stainless Billet Flanges -Made in the USA!