Hi Paula, Thank you for your enquiry. Compatability with Mountain Buggy strollers will depend on which clip attachment is required to fir the required stroller. If your stroller is pre 2015 then you will require a Clip 23, if it is post 2015, then you will require Clip 32. As we are not stockists of Mountain Buggy products we would recommend contacting them direct for these parts. If you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our on-line store finder. Here you can find contact details for your nearest Baby On The Move store where one of our team experts can help find a suitable solution for a product you are searching for and assist you with any further questions you may have regarding our range of products available. We hope this has helped with your query.