Due to it's details this WS-series by Weed-Star convinces everybody, f.e. at the Mahony Icebong :

With hammercut, blue decorated base, colered thick glass bowl, small WEEDSTAR writing underneath the kick hole, a blue spot opposite of the kick hole and of course a blue mouth piece.
Size: ca. 49 cm
Diameter: ca. 5 mm
Glass Thickness: ca. 5 mm
Joint Size: 18.8 mm
Tube: Stick with 18.8 mm to 18.8 mm hammercut-coupler and with 18.8 mm grins bowl.

After the repeated use of a bong it gets a bit stained - traces of lime from the water and tobacco deposit on the glass' surface. Some people may think that they have to clean their bong in hard work - but with the SCHMAND-WEG! bong cleaner you can clean your bong with or without using a brush.
"You can leave your head on", but you can use another head as well ...