Spira Flo Brush Tips iPad: On screen keyboard and Quick Settings. Compare to Ultradent: Inspiral Brush Tips. These syringe tips are ideal for controlled placement of materials in restorative procedures. Nylon brush fiber for controlled delivery of viscous material, etchants & resins. Use with our Porcelain Etch. Curion is proud to be an authorized distributor of Vista Apex products in Canada. This product is backed by the manufacturer's warranty.