Head size Size(mm) Packing 3/8" 1/2"xBWG9 20-25KG/Carton in Bulk 3/8" 5/8"xBWG9 20-25KG/Wooden Box in Bulk 3/8" 3/4"xBWG9 100Pieces/Box Then Cartons 3/8" 1"xBWG9 75Pieces/Box Then Cartons 3/8" 1 1/4"xBWG9 400Gram/Box 50Boxes/Paper Carton 3/8" 1 1/2"xBWG9 500Gram/Box 40Boxes/Paper Carton 3/8" 1 3/4"xBWG9 3/8" 2"xBWG9 3/8" 2 1/2"xBWG9 3/8" 3"xBWG9 13/32" 2 3/4"xBWG8 13/32" 3"xBWG8 7/16" 3 1/2"xBWG7