T8 (1ea) 48" Royal Blue Colored Fluorescent Safety Sleeve - Tube Guard 4FT T8 ROYAL BLUE SLEEVE (1ea.) 2 BLACK END CAPS INCLUDED The end caps allow the bi-pin end of the lamp to come through for a perfect fit in your existing fixtures. The sleeves also protect the lamps in case of accidental breakage or failure. ** NOT FOR USE WITH HI-OUTPUT OR VHO LAMPS