Check the listing for details. Metal Arrow Peep Sight Double String Compound Bow Target Hunting Archery Aiming. Color: Black, Condition: New. Listed at 10.45 USD. Item Name: Compound Bow Peephole Color: Black Material: Aluminum Alloy Weight: About 1.4g Size: 19*8*8mm Inner Core Size: 1/8,3/32,1/16,3/64,1/32 Suit For: double string compound bow Double-string metal peephole, improve archery accuracy, user-friendly design, quick and easy to install The aluminum alloy material is processed in one piece, the surface anodized treatment is smooth and wear-resistant, strong and durable Features: Keep the balance at three points and one line, and use the peephole sight to shoot objects in a straight line to improve the accuracy of archery Equipped with inner core: different sizes of classification options Equipped with 1/8 1/16 1/32 3/32 3/64 five different sizes of inner core Function display: The diameter of the peephole is selected according to the size of the sight head and its own position. Generally, the diameter of the peephole is larger, which is convenient for aiming. The diameter of the peephole is more suitable for improving the accuracy of archery.