This system includes :VENTILATION SIDE PORT-2PCS1.2*5 STAINLESS STEEL SCREWS-8PCSM1.2 LOCK NUTS-8PCSProduct major function & usage:COOL DECORATIVE ROLE FOR TRXTHE SCREWS AND LOCK NUTS INCLUDED ARE FOR FIXING IT SET UP, YOU WILL NEED TO THE DRILL THE HOLEON THE SHELLSUITABLE FOR TRX 4 TACTICAL DEVICE 82066-4