These EK Archery Siege crossbow bolts are the only bolts compatible with the EK Archery Siege Crossbow. This item contains six 15.5" carbon bolts which are only 280g each. 

Specification:

• Pack of 6 
• 15.5" carbon bolts 
• Weight per bolt: 280g
• 2" Vanes - 2 Red, 1 White