Carbon Express CX Triad In-Out 2pc Inserts .166 Size 2 12pk. These 97 grain inserts have a .166 diameter. 12 per package. Specifications for Carbon Express CX Triad In-Out 2pc Inserts .166 12pk: Manufacturer: Carbon Express Quantity: 12 Package Contents: Carbon Express CX Triad In-Out 2pc Inserts .166 12pk Carbon Express 50442: CX Triad In-Out 2pc Inserts .166 Size 2 12pk