Ronstan's External Spinnaker Pole End Fitting has a chrome plated forged bronze body with a stainless steel snap-on plunger pin and strap. It will accept a 3/8 in. (9mm) mast ring or line. It mounts to the exterior of a 1 1/4 in. (31mm) pole and weighs approximately 6.2 ounces (176g).