For refilling the Pica Visor Permanent Longlife Industrial Markers, which provide waterproof markings on almost all material surfaces. It never dries out and maintains full performance from the first to the last stroke. This marker is extremely economical, as one refill can replace up to five conventional ink or paint pens. It is also very environmentally friendly due to its economical consumption and the ability to refill in seconds. Avoid refill temperatures above 40 °C.