What's the Problem (Executive Function)

Copper Bar Round for Industrial Parts Length 100/500MM, Phosphor Bronze Bar Diam 1-35mm 1pc, Tin Phosphorous Copper Rod(22X500MM)

WSYCWG Pure Copper Rod Raw Materials, Solid Copper Rod Lathe Bar 30×150Mm-40×150Mm Suitable for Industrial Applications,Diameter 32mm

WSYCWG 250Mm Long T2 Copper Bar, Pure Copper Round Rod Industrial Raw Materials Diameter 16Mm-25Mm,Diameter 25mm

WSYCWG 2 Pcs Length 500Mm T2 Copper Rods Metal Rods Diameter 8.5-10Mm Suitable for Industrial and Electronic Applications,Diameter 8.5mm

WSYCWG Copper Solid Rod Length 100Mm, Raw Materials Pure Copper Rod Diameter 70-100Mm Ideal for Industrial Applications,Diameter 85mm

WSYCWG T2 Copper Rod, Solid Copper Rod Lathe Bar 45×150Mm-60×150Mm Suitable for Electrical, Industrial and Crafting Projects,Diameter 45mm

Copper Round Bar,200mm C11000 Copper Rod Pure Copper Metal Rod for Handmade and Industrial Processing (50mm)

WSYCWG 99.9% Pure Copper Rod Diameter 10-15Mm, 400Mm Long Copper Metal Bar Suitable for Metal Craft, Electrical and Industry,Diameter 10mm