need help will this work

well i need as scale and im checking these out i was wondering if these would work for weed this may be in wrong forum but if can help please let me kno if i can weigh weed in blunts/grams with this

here links
http://cgi.ebay.com/ws/eBayISAPI.dll...981390195&rd=1

http://cgi.ebay.com/ws/eBayISAPI.dll...982922264&rd=1

http://cgi.ebay.com/ws/eBayISAPI.dll...PcY_BIN_Stores

http://cgi.ebay.com/ws/eBayISAPI.dll...982081584&rd=1

i only looked at the first scale, and yes it will weigh what you want it to

as long as your scale measures from 0 to like 28 grams, thats all it seems like you will need