UBB.com Thumb Insert Holder
$10.99Price
Storage case to keep your thumb inserts from being damaged or lost in your bowling ball bag. Available in 2, 3 or 4 hole models. These are for the standard 1 1/2" thumb hole sleeves (Turbo/JoPo) but can also hold your 1 1/4 & 1 3/8 IT thumbs.