Check the listing for details. Columbia 42" Cam-Lock Compound Mud Tube. Condition: New. Listed at 259.00 USD. Columbia 42" Cam Lock Compound Mud Tube Introducing the newest Columbia 42" Cam Lock Compound Mud Tube. If you are in the market for a compound tube, this is it. The compound tube acts like a giant syringe for drywall compound. With this newest version you can fill it by sucking the mud out of the bucket like a standard compound tube or you can use your compound pump. This is a really nice feature and makes filling the tool so much faster and easier. The cam lock feature also sets this compound tube apart from the rest. Simply release the 2 cams and the entire head comes off for easy clean up. This tube will work with:All Angle Heads/Corner finishersComes with extra ball to fit all Better-Than-Ever Tools Al's Taping Tools is the Largest Drywall Tool Store in the World! We are also a fully equipped automatic drywall tool service center with over 30 years in the industry. We service all major brands. All of our service techs are also fully trained in the operation of the tools that we sell and service. So if you are new to automatic drywall tools or have any questions please give us a call or send us a message. We are here to help. Al's Taping Tools & Spray Equipment815 Tower DriveMedina, MN 55340