ALVIN Fluorescent Professional Acrylic Triangle 45/90 Degree 4" Model 131F-4 Multipurpose Tool for Drafting Design and Architecture Great for Machining and Woodworking - 4 Inch

Will not discolor or warp with age and handling. The machined finish and hand-polished edges of the F Series (fluorescent) meets or exceeds government specifications. The F Series is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangle’s edge. All models feature a double-taper cutout center for quick, easy lifting from any angle. Supplied in poly bag with hanging hole.