WE-EF / 310-9018 Junction box JB20 - Wall entries Junction boxes are made from marine-grade, die-cast aluminium alloy. IK10. IP66. It’s available for wall and side (cable gland and conduit) entries. Description: Junction boxes are made from marine-grade, die-cast aluminium alloy. IK10. IP66. For wall entries. Specifications: A: 180 B: 143 C1: 51 Weight: 1.02