$fn=60;

include <BOSL2/std.scad>
include <BOSL2/shapes2d.scad>

height=12;
outer_diam=30;
inner_diam=13;

// Tube
* color("grey") {
    tube(od=12,wall=1,h=100);
}

// Ring
difference() {
    tube(od=outer_diam,wall=8,h=height,rounding=2);
//
    color("red") {
        rotate([0,90,0]) {
            cylinder(h=20,d=3.5);
            translate([0,0,-16]) {
                cylinder(h=10,d=6);
            }
            translate([0,0,6]) {
                cylinder(h=4,d=6);
            }
        }
    }

}


* color("green") {
    translate([-12,0,15]) {
        rotate([0,-90,0]) {
            cylinder(h=21, d=3.5);
            cylinder(h=5, d=8.5);
        }
    }
}