3M Diamond Grade LDS FY346 50 ~ Linear Delineation Panels Lds Fy346 Fluorescent Yellow (34 inch x 6 inch) 7000055541 Length_3 1 2 Inch bell shaped design to fit comfortably 3M Hydrogen Fluoride Cartridge bell shaped design to fit comfortably in the ear canal The complete system issues a pass or fail rating based on the employee's personal attenuation rating (PAR) when wearing 3M Peltor X Series X1 and 3M Peltor X2 Earmuffs 3M Linear Delineation Panels are designed to provide clear visual guidance for drivers navigating through work zones and challenging roadway conditions Panels are available in bright and fluorescent colours to provide increased visibility both in daytime and at nighttime