Power Supply Strap – Power Mac 7100, Quadra Centris 650 $10.00 Hold or tie down Power Supply Strap - Power Mac 7100, Quadra Centris 650 quantity Add to cart Add to Quote Continue Shopping Category: Case & Internal Parts (Macintosh) Tag: power supply Description Apple 922-0906, 815-1458. Power Supply Strap, hold down for Power Mac 7100, Quadra/Centris 650