Overview Reviews Product Description Diaphragm fits Kolstrand's popular Tyee #1 Pump. Diaphragm measures 10 1/4 Inch Outside Diameter. Product Videos Custom Field Product Reviews Write a Review Write a Review × Kolstrand Diaphragm for Tyee #1 Pump - 1-PN Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *