Power grip hose clamp. These hose clamps are heated and shrink over the hose to clamp . Four sizes available:
1699= Fits 3/8" Hose O.D. 11/16" to 13/16"
1698= Fits 1/2" Hose O.D. 13/16" to 15/16"
096= Fits 5/8" Hose O.D. 15/16" to 1-1/16"
097= Fits 3/4" Hose O.D. 1-1/16" to 1-3/16"