Does anyone use/bill for Orthoglass? We have a couple questions and hope someone can advise us.

Ortho bills for casting/splint materials and they use something called Ortho Glass which is fiberglass with padding around it. Would A4590 be the correct CPT for billing this material?

How much Ortho Glass in yards would this cpt cover? There was question over how many cpt units to bill for if they use X amount of yards on a patient.

thanks