Periodontal probe equipment by the School of Dental Hygienists in Bern. Graduation: 3-6-8-11 mm, there is a ball at the end with diameter of 0.5mm. There is plastic handle at the back which is black in color. The Deppeler periodontal probes have amalgamation of elasticity and flexibility. Great durability is ensured by color marking, which is special technique. The marking is absolutely correct for measuring periodontal pockets accurately. The plastic DMS handle is highly resistant and extremely light in weight with attractive design. Sterilization has no effects on this plastic. There is no chance of color fading. You can place order for screw tips separately.