Accufab v-band clamp transition ferrules meet your tubing connection needs. The ferrule is CNC machined from billet aluminium.
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Available Versions. 4.5" to 4.0" transitional ferrule. The smaller diameter will meet your 4.0" tubing at the weld. It transitions to 4.5" to accommodate the use of a 4.5" V-Band clamp, sold separately.