Copper Bulb - 1/2" x 3" This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Drawing Production of a Copper Bulb - 1/2" x 3" (Drawing). Approximately 0.5 inch OD x 3.0 inch long. Please see drawing for all specifications. Part Part Number: 0172-000 Material: Cuivre Material Grade: Technical Specifications Category:Drawing Dimensions0.5 x 3.0 inch Tolerance:0.005Annual Usage:744000.0 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your quoting experience Drawing: Deep drawing is a stamping process in which sheet metal is 'drawn' over a punch as it forces the metal into a recessed die. Deep drawing produces cup-like shapes.