Excalibur Crossbow Quill Crossbow Bolts w/Illuminated Nocks 16.5in 3pk. The Quill carbon arrows are 16.5 long and feature 2 offset vanes for flawless flight when matched with an appropriate broadhead and extensive testing has shown them to be the perfect choice for hunting with all Micro crossbows. Specifications for Excalibur Crossbow Quill Crossbow Bolts: Manufacturer: Excalibur Crossbow Length: 16.5 in Archery Application: Hunting Features of Excalibur Crossbow Quill Crossbow Bolts: 16.5" Long arrow Teamed with Easton Quality Carbon Arrows Specifically made for Micro's 2 offset vanes for flawless flight Package Contents: Excalibur Crossbow Quill Crossbow Bolts Specifically designed for use with Excalibur Micro Series crossbows. They are 16.5 inches long and feature 2-inch offset vanes. Outside Diameter.347 Inside Diameter .3015 Weigh 9.9 GPI Total arrow weight 163.4gr.