3 pairs of T-shape silicone converters of loop band slingshot to flatband slingshot

This is a professional converter that changes your tube slingshot into flatband slingshot instantly by fitting your slingshot precisely.
There are four size editions of this converter. They are 10.5 mm for slingshot with 9mm to 10mm round ring, 11.5 mm for slingshot with 10mm to 11mm round ring, 12.5 mm for slingshot with 11mm to 12mm round ring and 13.5 mm for slingshot with 12mm to 13mm round ring.
Please make the comment such as '11.5 , 12.5...' in comment textbox. If no comment made, the random size will be shipped.
This product includes 3 pairs of T-shape silicone converters, ie, 6 pieces. The slingshot is not a part of this product. It's just for demo. It's made of food-grade silicone rather than common rubber.
The flatband is tightly fixed and no hurt to flatband.
Popular models and T-share converter match:
Cougar , Antelope : 12.5 edition
Jungle, Toucan, Panther: 10.5 edition

If you are not sure the size of your slingshot round ring, you can buy this general converter