About Product:Name: whiteboard pen packaging: single color bags of 50 a bag, color: black ink color coat this product with magnetic rubber and plastic magnetic paragraph 2 of this product for disposable alcohol ink black and white board pen is a tool written in black and white board, similar to the blackboard chalk. Black and white board pen is an important member of the teaching, office supplies, whiteboard pen has a wide range of uses, writing is smooth, convenient and clean clean, environmental protection, safety, warm tip: This product is volatile, the use, please cover tight cap, prolong the service life.