interference light tube

Optical accessory, also known as a lens hood, designed to block unwanted light entering from the side; improves contrast and reduces reflections in optical setups
Sturdy metal tube, black-coated, fits onto the P5310-2A lens holder. SE
Material: Aluminium, powder-coated
Dimensions: D=55 mm, L=80 mm
Weight: approx. 89 g