Description Manufactured with stainless steel, steel material and adopt precision welding technology, can bear heavy load, not easy to damage., it is strong and durable. The bike trailer coupler is easy to install, and won't take you too much time. Perfect for towing the trailers, riding your kids and pet around and towing some items. Features -Color:Black -Material:stainless steel, steel -Size:5.50X4.50X2.30cm/2.16X1.77X0.90in -Size:5.60X5.20X1.80cm/2.20X2.04X0.71in -Inner diameter: 1.1cm -outside diameter: 2.3cm -Hole diameter (on column): 0.39cm -Column diameter: 1.7cm -Hook: 4.6cm -Manufactured with reliable stainless steel, steel material, it is strong and durable for your long time use. -Easy to install, can be applied to bicycles, children's trailers, pet carrier, etc., suitable for daily use and family travel, bringing a lot of convenience to your travel. -Good workmanship and sturdy materials ensure a long service time and perfect details. -The bike trailer hook attachment is equipped with a connecting pin, which is difficult to open after installation, and the hook is not easy to fall off, ensuring the safety of babies and pets. -The bike trailer hitch attachment is heavy duty, strong and durable, and hard to damage. Package list: 1 x Bike Trailer Hitches with Buckle