The 3/4" ZAP NSN Pad Set is the standard system authorized for all Ground Combat helmets. The set includes 7 ZAP pads comprising 1 circular crown pad (NSN 8470-01-546-9415), 2 trapezoid pads (NSN 8470-01-546-9407), 4 oblong pads (NSN 8470-01-546-9356), as well as an illustrated instruction manual.