Cheap And Discounts B3F-4050 B3F-4055 B3F-5050 B3W 12X12X7.3mm genuine Japan Omron small touch switch button, 4-pin normally open Wholesale. Buy Directly From Merchant Shanghai XH Electronic Technology Development Co Ltd Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.