Each acrylic replacement pad kit contains:

1 - Adhesive-backed natural felt pad for protection on outer surfaces of acrylic tanks
3 - 9"x5" acrylic-safe inner scrubbing pads (makes 12 Great White or 12 Tiger Shark pads)
1 - Self-adhesive, non-toxic medical grade Velcro pad for holding acrylic safe scrubbing pads on inner assembly.