Jintop via Amazon offers the Guhiwuk Philips Sonicare Toothbrush Replacement Head 4-Pack for $14.99 $13.99. Coupon code "5SZPHNRP" cuts the price to $9.74 $9.09. With free shipping for Prime members, that's $5 off list and the lowest price we could find. They each come with a protective cover and feature diamond shaped bristles. Deal ends May 21.