an exterior portion possessing a facing surface, having a centerpoint along a central axis perpendicular to said facing surface and an opening to allow ingress of said flexible tubing;

an interior portion, axially aligned with said exterior portion, having a centerpoint, possessing a common central axis with said exterior portion, an exiting surface and an opening to allow for egress of said flexible tubing;

a first angularly aligned conical section, interiorly inclined emanating from said exterior portion toward said centerpoint of said interior portion, axially aligned with said common central axis, following a consistent angle α terminating at a first edge that is formed by a first plane bisecting said first angularly aligned conical section;

a second angularly aligned conical section, interiorly inclined emanating from said first edge of said first angularly aligned section, sloped inwardly toward said centerpoint of said interior portion, coaxial with said first angularly aligned section, following a consistent angle of β, said second angularly aligned conical section terminating at a second edge formed by a second plane bisecting said second angularly aligned conical section, said second plane being parallel to said first plane; and

a reverse angularly aligned conical section, interiorly inclined emanating from said exiting surface of said interior portion toward said centerpoint of said exterior portion, axially aligned with said common central axis, following a consistent angle γ terminating at a step point along said bisecting second plane, said step point is located radially below the intersection of said second plane and said second angularly aligned conical section.