goof proof shower kits & floor kits (ssk-401 shower kit) mark e industries standard shower kits permit easy construction of shower floors with the proper minimum water drainage slope of 1/4 per 12" run. these time saving kits permits construction of standard 36" x 60" shower areas with a centered drain. custom shower kits and additional components are available to accommodate areas up to 144" x 144" with centered drain. pre-pitch kit std-201 pre-pitchtm is a unique, stay-in-place spreading tool designed for use underneath shower pan liners. pre-pitchtm is a unique tool that creates the proper sub floor slope needed underneath the pan liner to manipulate the water towards the weep holes that are integral part of shower floor drains. by having a pitch under the pan liner, water that passes through the mud bed is now directed to the weep holes instead of being trapped between the mud bed and the liner. this 'ponding' or collection of water is where many mold and mildew related issues originate. easily cut with hacksaw, pvc cutters or grinder. use on wood sub-flooring or concrete floors. economical, lightweight non-rotting plastic. kirb-perfect kp-543 kirb-perfect is a stay-in plastic form designed to eliminate the possibility of any nails puncturing the liner on the top or inside walls of shower curbs. kirb-perfect is attached to the outside wall only, eliminating any water intrusion to the stacked 2x4's that creates the curb. top has built-in pitch into shower. can be used with or without the presence of wood. preserves the integrity of the liner. provides a cement backing for ceramic, porcelain or stone. quick pitch qpk-101 the quick pitch float stick system permits easy construction of shower floors with the proper minimum water drainage slope of 1/4" per 12" run warning: this product can expose you to chemicals which is [are] known to the state of california to cause cancer and birth defects or other reproductive harm.