Tubeology Spate Salmon Flies Pack 3 (50mm Tubes) With Interchangeable Heads. Spate Water Collection 1 inc Black & Orange, Black & Yellow (JC Feather cheeks), Junction Shrimp (JC Feather Cheeks), Hairy Mary, Willie Gun, Stoats Tail. Interchangeable heads and hot spots allow hundreds of variations from these flies.