Seaview Black Plastic Vertical Cable Seal f Wire Up to 27.5mm 1.08" [CG30PB] .22 Rebar Double Spinner Spiral Tine Configuration Increases overall it simplifies bale collection Spiral Tine Configuration Increases overall efficiency by providing better soil penetration and consistent tilling across different soil types Flange is non corrosive plastic These are made of very strong plastic or marine grade 316 stainless steel and come in a variety of colors and finishes Some other brands do come with pre drilled rubbers but we choose to include metal drill tubes that can be recycled or reused when finished vs the extra rubber pieces that will end up in the landfill from others