Loop Salmon Double Hooks: Tube doubles, Tube Singles

Loop Bottle Tubes – Guide Flyfishing, Fly Fishing Rods, Reels, Sage, Redington, RIO

How to tie a hook on a tube fly, Global FlyFisher

Loop salmon doubles (tube & tying) - Salmon Fishing Flies from Helmsdale Company

Tube Hooks - TUBE FLIES

Flies for Spey in March

Salmon and steelhead - Partridge of Redditch

Ken Sawada XD1 Tube Double - Salar Flies

Finest Salmon, Steelhead, Sea Trout Flies

Some hook advice; Salmon Fishing Forum

The Daiichi 7131 double hook is produced from one piece of wire doubled back in the shank of the hook where it is brazed together. The wire diameter and shape of this hook connotes a “low water” style of salmon hook. This is a traditional hook for salmon, though some salmon fisheries now restrict the use of double hooks.

Daiichi 7131 Double Salmon Hook - Size 8

Salmon Fly Hooks