The rebar caps are meant to prevent rebar rusting from rain,water, etc. Rebar Safety Caps are specifically designed for use in the construction industry and fit over the ends of protruding bars reducing the risk of injury. Rebar safety is important to rebar workers and everyone around them. The rebar caps are meant to prevent rebar rusting from rain, water, etc. The raw material is plastic, so if the rebar cap still in good condition and the fins are not broken¡ê¬they may be reused. We have different sizes and designs to fit the rebar from diameter12 to diameter40, rebar #2 to #40. 100-500unit/carton, base on order