FEATURES: Non-toxic, high-visibility Prima Tech Paint sticks come in a durable plastic housing, designed to protect from crushing, smearing, melting. The twist-up design allows for full use of the product without losing the last few inches of the paint stick. More product offerings than traditional peel sticks. Prima Tech's retractable Twist-Up Livestock Markers are used mainly for short-term markings on cattle, sheep and pigs. For a good, visible mark, apply to the upper back of the animal. Markings will last about 4 weeks on cattle and sheep and 1 to 2 weeks on pigs. Reliable in all temperatures Colors are durable and stable Strong in color with high luminosity Priced per stick