Two versions are available: a 10" "vomit pack" and a more standard 12" version.
"Vio-lence's infamous "vomit pack" employed unique packaging. The 10" promo single was issued in a specially-designed plastic sleeve filled with realistic fake vomit, allegedly a mixture of vegetable soup and vinegar. Unless you've stored your copy in the freezer for the last 14 years, it's likely dried up like other copies. The back sleeve incorrectly spells Side B as "Phoba Phobia"." - from www.vio-lence.com
The 12" version comes with a glossy generic Mechanic cover.