MD-25 and HD-25 comprises with 6X8W, 312 nm or 365 nm UV tube, 25X25 cm filter size, low background black glass, UV radiation blocking cover, high/low select switch, and reflection aluminum plate popularly for visual gel stained by EtBr, SYBR Green, Coomassie Blue, SYBR Gold, SYPR Ruby, and SYPR Orange.