467 Heavy Duty Door Stop by Rockwood Hardware

Material: Flame Resistant Molded Rubber Bumper.
Features: Suitable for concrete floor or wall mounting. Ideal for use in high vandalism or security areas. No exposed fasteners.

Mounting: Drill 1" diameter x 2-1/2" deep hole, fill with anchoring grout.
Mounting Bolt: 5/8" x 2-1/2".
Dimensions: 2" D x 3-1/2" H.