Tri-Clamp HERMS Coil Size 25' (10 gallon) - $200.00 50’ (15-50 gallon) - $225.00 $200.00 Qty: Add to Cart Product Specifications 25' x 3/8" or 50' x 1/2" 304 Stainless Steel Coils for Tri Clamp kettles (Spike+) include (2) tri-clamp fittings, (2) 1.5” clamps, and (2) 1.5” gaskets.