Product Details: Dark, non-haze, long time writing! Direct liquid type with dark ink! No knocking or pushing tip is required. Cartridge type and economical Can be easily replaced by combining the cartridge to the rear end of the main unit. Dry erase markers; Refillable; Direct liquid type; E-tank cartridge; Specifications: broad and medium type; Art Supplier Dot Com Postcard A: Limited Product!! 1 x Cute Animal Postcard