Usage Tips:OT-10A Specifications Overall Length: 15mm, Tail Length: 6.4mm Ring Diameter: 5.3mm(Inner), 9.2mm(outer) Wire Section: 1.5-4mm2(AWG 16-12) Quantity: 20pcs Material: copper COLOR: copper OT-20A Specifications: Overall Length: 22.7mm Tail Length: 7.4mm Ring Diameter: 6.3mm(Inner), 11.2mm(outer) Wire Section: 1.5-6mm2(AWG 16-10) Quantity: 20pcs OT-30A Specifications: Overall Length: 25mm Tail Length: 8.5mm Ring Diameter: 6.3mm(Inner), 12mm(outer) Wire Section: 2.5-6mm2(AWG 14-10) Quantity: 10pcs OT-40A Specifications: Overall Length: 25.5mm Tail Length: 8.6mm Ring Diameter: 6.3mm(Inner), 12mm(outer) Wire Section: 4-10mm2(AWG 10-8) Quantity: 10pcs OT-50A Specifications: Overall Length: 28mm Tail Length: 9mm Ring Diameter: 6.3mm(Inner), 13mm(outer) Wire Section: 4-10mm2(AWG 10-8) Quantity: 10pcs Open barrel copper lug terimal blocks assorted kit including OT 10A-50A 5 type 70 pieces in total Made from pure copper with good conductivity, solderless wire crimp connection widely used in the electrical wire connecting Package Contents: 20* 10A Copper Ring Lug Terminals Wire Crimp Connector 20* 20A Copper Ring Lug Terminals Wire Crimp Connector 10* 30A Copper Ring Lug Terminals Wire Crimp Connector 10* 40A Copper Ring Lug Terminals Wire Crimp Connector 10* 50A Copper Ring Lug Terminals Wire Crimp Connector Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.