National Gypsum CB3612 Cement Backerboard 1/2" x 3' x 5' Rotary Callout Size: 3D

Callout Size: 3D

Rated to handle up to a 300 W incandescent bulb (bulb not included)

Left-mounted slide switch with quick-off feature for added safety

For HVAC steel stud knockouts

National Gypsum CB3612 Cement Backerboard 1/2" x 3' x 5' Rotary Callout Size: 3D"PERMABASE" CEMENT BACKERBOARD 1 2" x 3' x 5' A rigid substrate made of Portland cement, aggregate and glass mesh It provides a hard, durable surface that is able to withstand prolonged exposure to moisture An ideal underlayment for interior applications such as shower and tub enclosures, countertops and floors WARNING: This product can expose you to chemicals including Carbon black (airborne, unbound particles of respirable size), which is known to