BUT Series Standard Duty - Well Casing Thread Protection Patent-pending Standard Duty Well Casing Thread Protectors are designed to protect the exposed well casing pin ends while in transit or storage. The unique and innovative design allows the protectors to be installed as a push-on (non-threaded) cap, with a tear ring and rail removal feature, adhering to API standard duty requirements. The BUT series will save time and resources with installation and removal. * Patent Pending Design - no other like it in the indsutry. * Easy installation - does not need to be threaded on. Can be seated using a rubber mallet. Tapered end allows casing to slide up and over each other when loading or unloading from a stack. * Easy to remove at the drill site. No tools required for removal. Simply pull the tear ring and remove the protector. * Designed and tested for impact resistance, temperature extremes, salt spray corrosion and vibration. * Range of sizes: 4-1/2" thru 13-3/8" A Material: Recyclable polyethylene Color: Black CLT Series Standard Duty Long Thread Well Casing CLT Series standard duty long thread well casings are designed with recyclable polyethylene and cover long threads on exposed well casing pin ends for rig ready shipments. The casing includes tear-ring for easy removal and installation; meets standard duty requirements. Material: Low-Density Polyethylene Color: Black Design CST Series Standard Duty Short Thread Well Casing CST Series standard duty short thread well casings are designed with recyclable polyethylene and cover short threads on exposed well casing pin ends for rig ready shipments. The casing includes tear-ring for easy removal and installation; meets standard duty requirements. Material: Low-Density Polyethylene Color: Black Design 340 * For other material and color options, contact customer service.