Actual product many very based on size and options selected.
Brand:
Wapsi
Model:
Sili Worms
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Price: $8.39 
(depends on options selected above)
Description
Wapsi Sili Worms are made with very stretchable silicon. Soft and straong material is especially used to imitate a worm pattern.
Very useful for tying nymphs, shrimps, grubs, San Juan Worms and also very popular for legs on poppers, bass bugs and terrestrials.
Buy on-line or talk with a knowledgeable fly fishing specialist: