Gut Knife | Doppler Phase 4 (Gut P4) was added to the game on January 8, 2015, alongside the “Full Spectrum” update. The skin is available in all “Chroma” cases.
The blade of the knife is painted with metallic paints and adorned with a pattern of translucent wavy lines resembling smoke. The color scheme of the skin includes various shades of blue, brown and black creating gradient transitions. The handle is made of wood and remains unpainted.
Float Value of the skin ranges from 0.00 to 0.08, which makes Gut Knife | Doppler Phase 4 available only in Factory New and Minimal Wear condition. At levels of wear close to the maximum, the knife has noticeable scratches and abrasions located on the spine and on the corner of the blade close to the handle.
The pattern index affects the ratio of colors as well as the location of blue, brown and black areas. Pattern variations with a predominance of blue on the play side of the blade are titled “BTA Blue”. Knives with only blue color on the blade resemble Gut Knife | Doppler Sapphire and are titled “Max Blue”.
The quality of Gut Knife | Doppler Phase 4 is Covert. The skin has a StatTrak option and is close to phases 1 and 3 in terms of rarity. The skin belongs to the "Gut Knife | Doppler" series.
Due to a relatively low price, Gut Knife | Doppler Phase 4 became one of the most popular and common skins in the “Doppler” series.