$fn = 180;
tube_inner_diameter = 71;
tube_outer_diameter = 76;
// Lid
lid_height = 10;
latch_width = 10;
latch_height = 4;
groove_depth = 7.5;
groove_length = 50;
// Top
bumper_height = 15;
bumper_edge_radius = 5;
bumper_diameter = 80;
bumper_tube_depth = 4;