920 plastic knob cap products are offered for sale by suppliers on Alibaba.com, of which other electronic accessories accounts for 14%, lids, bottle caps & closures accounts for 5%, and furniture handles & knobs accounts for 1%.
A wide variety of plastic knob cap options are available to you, such as non spill, non-refillable and child-proof.You can also choose from stainless steel, iron and aluminum alloy plastic knob cap,