Schluter® KERDI-DRAIN FLANGE KIT 2" ABS (10)Contractor pack 10 bonding flanges for KERDI DRAIN in 2" ABS. If you're a pro installer doing multiple shower builds, buying the 10 pack saves trips to the supply house and usually gets you a better per unit price. Each flange features Schluter's fleece covered design that bonds into thin set mortar, creating the watertight connection between your ABS drain body and KERDI waterproofing membrane. 10 pack of 2" ABS bonding flanges for KERDI DRAIN Fleece