The Aaliyah Unit is constructed using 4 bundles of Raw Indian Straight Hair 4 - 24” and a 5x5 - 20” Raw Vietnamese closure. The Aaliyah Unit is a machine made unit. The available units are a size 21” (Small), 22” (Medium), and 23” (Large) circumference. The Aaliyah Unit is a glueless unit, no install needed. PLEASE BE SURE TO KNOW YOUR CORRECT MEASUREMENTS* Sew QueenPin Luxury Wigs does NOT replace or exchange units due to incorrect sizing. THIS IS A PRE-SALE UNIT GENERALLY, ALL ORDERS ARE SHIPPED 7-21 BUSINESS DAYS AFTER YOUR ORDER HAS BEEN PLACED THIS DOES NOT INCLUDE THE WEEKENDS.If you are getting a unit customized it can take longer due to units being customized in the order which is placed. *There are NO REFUNDS or EXCHANGES on any units.**ALL SALES ARE FINAL*