quick cap question

[blanik]

i'm doing a pedal asking for some 1uF electrolytic caps, i have those but it would be more convenient for me to use something smaller on some part of the PCB, i happen to have a strip of 1uF caps shaped like resistors but with a tapered end marked by a +
on the cap there are the following numbers:

105M   (value but what the M stands for?)
+  35K (with the K underlined... + is the polarity i presume, 35 V?)
9148    (no idea)

the caps are tan color

could those be used in place of 1uF electros?

[BAARON]

They sound like tantalum capacitors.  Yes, they can be used.  105 is the value, as marked on any film or ceramic cap.  The M probably indicates tolerance (i.e., how close to 1uF the cap is guaranteed to be).  Yes, the + indicates polarity.  Don't stick it in backward.

105 = 1uF
104 = 0.1uF or 100nF
103 = 0.01uF or 10nF
102 = 0.001uF or 1nF or 1000pF
101 = 0.0001uF or 0.1nF or 100pF
10 = 0.00001uF or 10pF

As you can see, you take the first two digits, then add a number of zeroes after them equal to the third digit, and you get the value in picofarads.  So, 473 would be 47,000pF, which happens to be 47nF, which happens to be 0.047mF.