SCUD-BACK is the most natural looking wing-case and scud-case material we've used (thin, textured, translucent). Flexible and it stretches for smaller scud and nymph patterns. FANTASTIC LOOK! SIZES: (1/4" for size-10 +), (1/8" for size-12 & smaller). COLORS: (1)Clear, (2)Orange, (3)Grey, (4)Tan, (5)Red, (6)Lt-Olive, (7)Dk-Olive, (8)Pink, (9)Black, (10)Brown, (11)Chartreuse, (12)Yellow, (13)Summer-Duck, (14) Olive, (15) Olive-Brown, (16) Shrimp-Pink.