Shrimp tubes. Brass. Available in four sizes: 10mm, 14mm, 19mm and 25mm. No flange. Inside hole diameter is 1.85mm to allow for 1.8mm tubes. No flange; this allows for cone heads to be added. Perfect for very heavy shrimp patterns in combination with 5mm/1.8mm hole cones of brass or tungsten. Used for shrimp patterns, Snaeldas, Franc ‘n’ Snaeldas, Frances, squid patterns, etc. The 25mm tubes are great for King Salmon patterns that require a bit of weight to get down. The tubes are ribbed to prevent sliding of the materials. 10 per pack.