Home UL UL Subject 639:2013 UL Subject 639:2013$158.60 Original price was: $158.60.$79.00Current price is: $79.00. Standard for Intrusion-Detection Units (CSDS Proposal, 2/1/2013) Underwriters Laboratories , 02/01/2013 UL Subject 639:2013 quantity Add to cart Category: UL Description Standard By:Underwriters Laboratories , 02/01/2013 Published:02/01/2013 Related products UL Subject 1670:1999 $159.67 Original price was: $159.67.$79.00Current price is: $79.00. Add to cart UL Subject 2329:1999 $290.32 Original price was: $290.32.$145.00Current price is: $145.00. Add to cart UL Subject 181B:1999 $187.58 Original price was: $187.58.$93.00Current price is: $93.00. Add to cart UL Subject 183:1999 $241.75 Original price was: $241.75.$120.00Current price is: $120.00. Add to cart UL Subject 1573:1999 $118.16 Original price was: $118.16.$59.00Current price is: $59.00. Add to cart UL Subject 83:1999 $244.01 Original price was: $244.01.$122.00Current price is: $122.00. Add to cart UL Subject 142:1999 $178.40 Original price was: $178.40.$89.00Current price is: $89.00. Add to cart UL Subject 508:1999 $136.87 Original price was: $136.87.$68.00Current price is: $68.00. Add to cart UL Subject 1063:1999 $297.76 Original price was: $297.76.$148.00Current price is: $148.00. Add to cart UL Subject 1971:1999 $215.53 Original price was: $215.53.$107.00Current price is: $107.00. Add to cart