When ordering from a warehouse cage maker, sort out the standard specs first and then decide whether to go non-standard. Before quoting, please prepare: customer name, contact person, phone, email; outer dimensions (L/W/H); dynamic and static load; whether stacking and how many layers; and use (rack storage or logistics turnover). Among them, the 1000*800*840 model has a foot height of 100 and an internal usable height of about 700. It is a relatively common warehouse cage domestically, so stock and cost are both friendly. Standard sizes (mm): A-3: outer size 800*600*640 A-5: outer size 1000*800*840 A-7: outer size 1200*1000*890 Non-standard cages can be built to customer requirements. Xintongnuo suggests choosing standard where possible; non-standard is flexible but costs more and takes longer.