Machined from 6061 Aluminum.   Complete set  of 24 pcs required for the N11/17: 
 
- 10 x  large Main  lift point strut attach plugs 
- 10 x  small Longeron & main wing compression strut pluts 
- 3 x Empenage control horn rib attach plugs (an upgrade from hardwood dowel) 
- 1  pcs  spacer/bushing stock (can be cut for firewall bevel washers & lower "stn 117"  carry thru bolt spacers.