Item Weight 190 grams Item Dimensions LxWxH 4.72 x 3.94 x 1.18 inches Frame Material Steel Alloy About this item What you get: Comes with 2 sets of bike trailer couplers, each set is 2 tools, enough to meet your daily needs or share with your family or friends Universal design: Our bike coupler is suitable for QR axles and solid axles up to 12.2mm/0.5 inches, suitable for most children's bikes and trailers; Note: Compatible with Breezer style dropouts Durable and Durable Material: The bike trailer coupler is made of quality steel, which is sturdy and firm, not easy to bend or deform, with fine texture, durable for long-term use Functional Tool: With our bike trailer coupler, you can take your son or daughter and pet on a bike ride and enjoy this quick interaction, and have a great time together Portable to Carry: This sturdy bike coupler is not bulky, you can easily carry it in your bag for outdoor activities, connect your child's trailer to your bike, you can mount it on the rear axle of the bike