Mark E. Industries designs "Goof Proof" products to speed the construction of shower floors and curbs. Quick Pitch is a float stick system that creates the 1/4-inch/per ft. slope needed for proper floor drainage quickly and easily. Reliable in all size or shaped showers with walls up to 6 ft. away from the drain. Kirb-Perfect is a plastic form that eliminates the possibility of pan liner damage from nails, plus the added benefit of a cement backing for tile or stone. Both products include illustrated instructions for error free installation.