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Overview Reviews Similar Products --> Product Description Push in non vented gas cap. For 32-33mm tank openings. Fits Peugeot 103 and Piaggio ciao. * Be sure to measure. *Must clean bung before installing This is 31mm and then 33mm on the ridges. Product Videos Custom Field Product Reviews Write a Review Write a Review Generic Plastic Push In 33mm Gas Cap, Non Vented - Peugeot / Vespa Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments * 1 Review Hide Reviews Show Reviews 5 33 mm gas cap plug type Posted by Kathy on 2nd Sep 2025 Cap was as described and fit perfectly. Speedy delivery and great email updates of transit. Will use again.