Item Number: 40218 Category: Beading Style: Nymo Thread Description: White; 100% Nylon; 9 yards on a plastic bobbin Size: D   Item Number: 40218S Category: Beading Style: Nymo Thread Description: White; 100% Nylon; 72 yards on a spool Size: D   Item Number: 40219 Category: Beading Style: Nymo Thread Description: Black; 100% Nylon; 9 yards on a plastic bobbin Size: D   Item Number: 40219S Category: Beading Style: Nymo Thread Description: Black; 100% Nylon; 72 yards on a spool Size: D   Item Number: WT212 Category: Beading Style: YLI Thread Description: Wonder Invisible Thread; very strong with little stretch; 1500 yds per spool; can be used for beading and jewelry making