Hello , Here Robin Cheu of Shangxin Caster Wheels China. We manufacture Industrial Carts PU Casters as below. Can we talk more ? Best regards, Robin Cheu Marketing Manager Ningbo Shangxin Caster Wheels Co.,Ltd No.187, Langxia street, Yuyao city, Ningbo, Zhejiang, China. Tel. +86 0574-62188162 Wechat/Whatsapp/ +86 15258368162