 
                                        4" Unwelded Extension Ring - Zinc Plated
                                                $6.75
                    
                    
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                            4" Unwelded Zinc Plated Steel Extension Ring Adjust distance of ring support from support rod Can be mounted with a right angle clamp holder / boss head Specifications: Inside Diameter 3.78" / 96 mm Shank Length 7.81" / 198 mm Shank Diameter .28" / 7 mm
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