All aluminum, weighs 8.5 grains, and perfect for any archer the Jim Fletcher TruPeep peep sight is a great addition to any bow. The Super Hunter version gives a greater hole to look through and lets more light in during low light shots. The ingenious design allows perfectly round, shaded hole at full draw, elminating the need for protruding hoods. String roll and angle not a problem. Safety tie groove keeps peep in place and no tools are needed for installation.