Grade R Twin Line Welding Hose, 3 8 in x 100 ft, BB Fittings, Acetylene and Oxygen no checkout or losing opacity Valve action mechanism or losing opacity Valve action mechanism prevents paint in barrel from drying when cap is left off Bullet tips are replaceable to assure complete use of paint in each marker Heavy duty aluminum body with large paint capacity One piece Y shaped body design with magnetic legs Built in dial with 2 1 2° increments that turns 360° Hardened center punch marks set position by taping with a hammer Used to establish and mark a centerline at any angle around circumference on a pipe or tank or as a protractor level Excessive heat can damage magnets High quality Grade R twin line welding hoses Green hose carries oxygen to welding equipment Red hose carries acetylene Hose cover resists oils