1.Type:Delrin knob stainless steel locking hand retractable plunger 2.Material: SS, carbon ... steel, 3,High quality,cheap price 1. Type: Delrin knob stainless steel locking hand retractable plunger2. Material: Stainless steel, carbon ... to your request.10. Standard and non-standard available Delrin knob stainless steel locking hand retractable plunger