This is the Du-Bro 937 Micro Ez Hinge 15

Now you can hinge your control surfaces with these popular pin style hinges. Designed for micro indoor and park flyer models, these use metal pivot pins and multiple connecting arms for strength. Overall Length: 1.28125 (1 9/32") or 7.14375 mm. 15/pkg.

Weight: 0.18 grams/ea.