The tops in jewelry craft beading and stringing wire is made by the Softflex Soft Flex company. They have recently come out with colors and I have found white is amazing when it comes to stringing pearls! This amazing fine, flexible yet strong 21 strand stainless micro wire is coated in white.
You can pick this item up in my supply shop for a reduced price of around 25% off retail.
Stop by the shop and peek at the Softflex Wire and other amazing jewelry supplies www.texasbeadz.etsy.com and here is the direct link to the wire http://www.etsy.com/listing/67357670/softflex-soft-flex-beading-stringing?nc=1