Specify how many parts comprise the original complete work, if this information is known or can be reasonably assumed.  This should be done in one brief statement that records both the number of units in hand and the original number of units in the complete work.  Include the number of units in a complete work in arabic numerals following the number of units in hand and the specific material designation (e.g., film reels, videodiscs).

300 ## $a 13 film reels of 13 (123 min., 11,003 ft.) : $b si., b&w ; $c 35 mm. $3 answer print.

300 ## $a 2 film reels of 2 (19 min., 652 ft.) : $b sd., b&w ; $c 16 mm. $3 dupe neg.

300 ## $a 1 videodisc of 1 (DVD) (95 min.) : $b sd., col. ; $c 4 3/4 in. $3 viewing copy.

300 ## $a 2 videocassettes of 2 (110 min.) : $b sd., col. ; $c 3/4 in. $3 viewing copy.

There may be several lines of physical description and the number of units in a complete copy may vary from line to line.  In these cases, it is not necessary for every line to relate the number of physical units in hand to the original unit count.  Use the number with the specific material designation to describe the work in hand.  Unit numbers may be supplied in parentheses following the specific material designation, as needed.  Clarification may also be placed in a note.  See 7B13.

300 ## $a 12 film reels of 12 (102 min., 9,143 ft.) : $b sd., col. ; $c 35 mm. $3 viewing print.

300 ## $a 13 film reels (102 min., 9,143 ft.) : $b si., cyan ; $c 35 mm. $3 original neg pic.

300 ## $a 13 film reels (102 min., 9,143 ft.) : $b si., magenta ; $c 35 mm. $3 original neg pic.

300 ## $a 13 film reels (102 min., 9,143 ft.) : $b si., yellow ; $c 35 mm. $3 original neg pic.

500 ## $a The color separation negatives are complete in 13 film reels.

300 ## $a 2 film reels (90 min., ca. 3,240 ft.) : $b sd., b&w ; $c 16 mm. $3 viewing print.

300 ## $a 3 film reels (90 min., ca. 3,240 ft.) : $b sd., b&w ; $c 16 mm. $3 master pos.

500 ## $a Viewing print and master pos seem complete. $5 DLC (Use institution’s local code.)

Sometimes the number of units in a complete work cannot be determined.  For works with uncertain or unknown original lengths, see 5B5.  For works never intended to be distributed, see 5B6.

See:

5B3.1.  1,000-foot 35 mm. film reels as standard

5B3.2.  Copies in formats other than the original 35 mm. format

See also:

5B.  Extent of work and specific material designation

5.  Physical Description Area