National Hardware Smooth Rods Cold Rolled 5/16" x 48" Brand_Chapin the cross bore should be

the cross bore should be 2-1/8 inches in diameter

And when the dusting head is dirty no need to try and shake it out or hand wash detach the microfiber head and machine wash then air dry

with a connecting rod-actuated piston pump

Dries to the touch in 30 minutes or less

National Hardware Smooth Rods Cold Rolled 5/16" x 48" Brand_Chapin the cross bore should beNational Hardware's Smooth Rod is designed for fencing, supports, railing, sign posts, frame work and other industrial applications. Made from cold rolled steel for higher yield strength, hardness, and tighter specification. Excellent forming and welding characteristics For exterior applications Meets ASTM A510