Doppler Phase 4

Doppler Phase 4 is the blue and purple, the bluest numbered phase version of the Doppler, paint index 421 or 855 on knives. It comes on 18 knives, and the cheapest Factory New copy is the Navaja Knife | Doppler at $103.98.

Every Doppler Phase 4 knife and its price

Every knife in Doppler Phase 4, with the lowest phase-tagged price in Factory New and Minimal Wear, standard and StatTrak™.

Doppler Phase 4 prices by knife
Knife	FN	MW	StatTrak™ FN	FN listings
Navaja Knife \| Doppler	$103.98	$212.10	$137.54	24
Gut Knife \| Doppler	$113.55	$172.63	$141.06	31
Shadow Daggers \| Doppler	$137.85	$261.39	$209.95	15
Survival Knife \| Doppler	$179.54	$240.00	$207.75	19
Paracord Knife \| Doppler	$185.44	$235.00	$236.26	34
Ursus Knife \| Doppler	$218.98	$349.95	$328.70	33
Bowie Knife \| Doppler	$267.55	$318.57	$292.15	27
Falchion Knife \| Doppler	$276.35	$369.99	—	18
Huntsman Knife \| Doppler	$289.18	$358.89	$358.33	34
Flip Knife \| Doppler	$304.82	$378.83	$359.43	49
Bayonet \| Doppler	$372.48	$483.39	$400.00	54
Nomad Knife \| Doppler	$375.51	$477.77	$370.85	22
Stiletto Knife \| Doppler	$481.93	$686.13	$529.90	14
Skeleton Knife \| Doppler	$571.74	$865.84	$619.00	32
Talon Knife \| Doppler	$762.22	$1,166	$875.91	48
M9 Bayonet \| Doppler	$950.00	$1,062	$893.16	56
Karambit \| Doppler	$1,200	$1,364	$1,272	86
Butterfly Knife \| Doppler	$2,818	$2,941	$2,810	12

Phase-tagged listings only, buyer fees included. We may earn a commission when you buy through a marketplace link on this page. Every price is the total you would actually pay, and marketplaces we don't partner with are compared the same way. How BO5 compares skin prices

Phase 4 vs other Doppler phases

Across 18 knives, a Doppler Phase 4 sits at a median 1.06× the cheapest phase of the same knife in Factory New. The Doppler family page compares every phase side by side.

Median premium of each Doppler phase
Phase	Median premium	Cheapest FN
Black Pearl	4.41×	Navaja Knife \| Doppler $301.18
Ruby	3.45×	Navaja Knife \| Doppler $263.53
Sapphire	2.19×	Navaja Knife \| Doppler $180.30
Phase 2	1.23×	Gut Knife \| Doppler $136.31
Phase 4	1.06×	Navaja Knife \| Doppler $103.98
Phase 1	1.01×	Navaja Knife \| Doppler $104.80
Phase 3	1.00×	Navaja Knife \| Doppler $104.33

Doppler Phase 4 questions

How do I know if a knife is a Doppler Phase 4?

Check the paint index: Phase 4 is 421 or 855 on knives. Phase-aware marketplaces also print the phase in the listing title.

How rare is a Doppler Phase 4?

Valve doesn't publish phase odds, so no exact rate exists. Within a case, every Doppler knife is one rare special item; the phase is decided by its paint index when it drops.

Does float matter on a Doppler Phase 4?

Very little. Doppler knives only exist between 0.00 and 0.08 float, so every copy is Factory New or Minimal Wear and the difference is hard to see.

Prices refresh automatically from each marketplace · Item facts from the CS2 game files