Silicone tip brushes. The perfect tool when undertaking any modeling job. Also suitable for applying oil glazes on flat vehicle surfaces. The white-tipped ones are normal hardness and the black-tipped ones are slightly higher hard. Suitable for any modeling putty, Apoxie Sculpt, Greenpower, Milliput, Sculpey, Fimo, etc. Use water, alcohol or vaseline as a softening agent to prevent the putty from sticking to the tip of the brush, extend its life by rinsing them regularly with soap and water gently. The variety of tips (5) in the set will make it easy for you to tackle any type of job.