The rubber door stoppers can be used in a wide variety of places- schools, homes, offices, businesses, etc.  The rubber material is safe for the doors and will not break easily. The hooks on the stoppers are a convenient addition to allow for the stopper to remain in proximity of the door when not used. 

Features:

Set of 4
Material: Rubber
Dimensions: 5.12 in L x 1.8 in W x 1.1 in H
Color: Taupe
Grips firmly on tile, concrete and wooden floor surfaces.
Slip resistance, high elasticity and wear resistance
Non-toxic and safe durable.
Hook allows for the stopper to hang on the door handle when not in use