Spare heads for the Plaque Seeker oral shower, 2 pieces, PS-100, Waterpik Oral Douche Accessories - Plaque Seeker end recommended for users with dental implants or bridges. Oral shower heads are replaced once every 6 months or when they no longer function optimally. Accessory for Waterik oral shower models: WP-100. WP-250. WP-260. WP-300. WP-450. WP-700. WP-900. The Plaque Seeker tip mounts as simply as any regular tip. Presentation: Package contains 2 Plaque Seeker heads.