I'M CURRENTLY IN THE PROCESS OF TESTING PRODUCT FOR CANINE APPLICATIONS. WHAT ARE THE STRENGTHS OF 3/8", 1/2", AND 3/4" BIOTHANE RESPECTFULLY. DO YOU HAVE ANY TUBULAR PRODUCTS? ALSO, BY WHAT MEANS CAN I CREATE EYES (CLOSED LOOPS) ON THE MADE TO LENGTH ORDERS IN MY SHOP. WOULD PREFER TO AVOID STITCHING. THANK YOU! JAMES. 