This ad is for ONE (1) 18mm SPOTTED BLACK HORN glass water pipe slide bowl w/ a built-in 4 hole glass screen. This unique robust white glass slide has a creative blue spotted design all over the slide, including the 18mm ground section.  

Over-all this slide is about 2 1/4" long and has an 18mm male joint size. The actual bowl part of the slide is a cone shape that is 3/4" diameter at the top surface x 3/4" deep with a built-in 4 hole glass screen at the bottom. The horn is about 2" long, and 3/8" in diameter at the bowl tapering to about 1/8" at the end. 

Excellent quality glass construction and good looking.