Overview Reviews Product Description Tosafot tzitzit dyed with Murex trunculus by the Ptil Tekhelet Assocation. Authorized dealer. According to the Tosafot's approach, on each corner you tie on two all-white strings, and two all-blue strings. Product Videos Custom Field Product Reviews Write a Review Write a Review × Ptil Tekhelet Ptil Tekhelet Tosafot Tzitzit Strings Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *